Across
Johnny runs ride-sharing firm bringing in billions (6)
I haven't cracked this one yet — but Fifteensquared have:
R (abbreviation for runs, in cricket scoring) + UBER (car ride-sharing firm), containing B (abbreviation for billions). Rubber = johnny = slang for a condom.
Olympians allowed to enter mixed heats (8)
I haven't cracked this one yet — but Fifteensquared have:
LET (allowed), entering into an anagram (mixed) of HEATS .
Reviewed Jacobi Lear, simply captivating National (7)
Finished with depression after hospital visits (7)
I haven't cracked this one yet — but Fifteensquared have:
TROUGH (depression, especially in weather forecasting), with H (abbreviation for hospital) inserted (visiting).
Which women's accessory? (4)
I haven't cracked this one yet — but Fifteensquared have:
W (abbreviation for women’s, as in WAAF) + HAT (a clothing accessory).
Ladies' College home match Helen played (10)
More keen on swapping francs for yen over there (6)
I haven't cracked this one yet — but Fifteensquared have:
[f] ONDER (more keen), with the F (abbreviation for francs) swapped for Y (abbreviation for yen).
Troops ordered to conceal equipment (7)
Wagon driver and Mary got frisky (7)
Bereaved woman seizes new opportunity (6)
I haven't cracked this one yet — but Fifteensquared have:
WIDOW (bereaved woman), containing N (abbreviation for new). As in football’s “transfer window” = a limited period of time during which something can be done.
Whimsically perhaps writing to Charlie - rambling, flamboyant in style (10)
I haven't cracked this one yet — but Fifteensquared have:
R (perhaps writing = whimsically, one of the “three Rs”) + anagram (rambling) of TO CHARLIE . Rhetorical = in the style of a grand public speech (rather than as in “a rhetorical question” which doesn’t expect an answer).
Food periodically consumed by embezzler? (4)
I haven't cracked this one yet — but Fifteensquared have:
Alternate letters (periodically contained by . . .) in [e] M [b] E [z] Z [l] E [r]. Assorted small dishes of food served together, often as an appetiser or to accompany drinks, in Greece and the Eastern Mediterranean region.
Only high fliers may take this post (7)
I haven't cracked this one yet — but Fifteensquared have:
Cryptic definition: post (mail) transported by aeroplanes.
New electronic mobile home in Spain that helps me relax (7)
I haven't cracked this one yet — but Fifteensquared have:
N (abbreviation for new) + E (prefix e- = abbreviation for electronic) + RV (abbreviation for recreational vehicle = motorhome = campervan) + IN + E (abbreviation for España = Spain). A patent medicine from the 1880s, supposedly a cure for anxiety; or more recently an alternative-medicine term to describe other treatments for the same purpose.
Very easy to return universal copyright bottled condiment (3,5)
I haven't cracked this one yet — but Fifteensquared have:
SO (very, as in “I’m so happy”), then EASY reversed (to return), containing (. . . bottled) U (abbreviation for universal, especially in film classifications) + C (abbreviation for copyright). A condiment brewed from fermented soya beans.
Pressure beginning to weaken cube (6)
Down
Right every time, Knut gets on board transport network (8)
I haven't cracked this one yet — but Fifteensquared have:
R (abbreviation for right) + ALWAYS (every time), with I (Knut, today’s crossword setter, talking about himself) inserted (getting on board).
One negotiates after pub profit starts to experience recession (9)
Out of bounds, goalie knocked over Blade (4)
I haven't cracked this one yet — but Fifteensquared have:
[k] EEPE [r] (goalie = short forms of “goalkeeper” in football), without the end letters (bounds), reversed (knocked over). For the surface, “The Blades” = nickname of Sheffield United Football Club. A blade used in the sport of fencing.
Young King, 26, worked as a guardian (8)
I haven't cracked this one yet — but Fifteensquared have:
TUT (young King in ancient Egypt, also called Tutankhamun: he became king when he was about nine, and died at eighteen), then an anagram (worked) of EARLY (reference to 26d).
Great beer Ruddles initially promoted (5)
I haven't cracked this one yet — but Fifteensquared have:
LAGER (a type of beer), with the R (the initial letter of Ruddles) moved a couple of places towards the front (moved upwards, in a down clue = promoted). For the surface, Ruddles was formerly the name of a brewery, and is still used as a brand name by the bigger company that bought it.
Finger beginning to throb - that hurts! (5)
Plan Nietzsche managed to keep under wraps (6)
Short trip by plane taking off first thing (5)
I haven't cracked this one yet — but Fifteensquared have:
[f] LIGHT (a trip by plane), taking off the first letter. As in “short measure” = light = failing to achieve the full quantity required.
Extremely upset clergyman on holiday finally (4)
I haven't cracked this one yet — but Fifteensquared have:
REV (abbreviation for Reverend = title for a clergyman), reversed (upset = upwards in a down clue), then the final letter of [holida] Y .
Rent golf's leading bag (4)
Infirm with age, Duke, more eccentric, discovered bingo (9)
I haven't cracked this one yet — but Fifteensquared have:
D (abbreviation for Duke) + ODDER (more eccentric) + [b] ING [o] without the outer letters (dis-covered).
After draining cuppa, Herb put on air-conditioning in US car (8)
I haven't cracked this one yet — but Fifteensquared have:
C [upp A (after draining = inner letters emptied out) + DILL (a herb) + AC (abbreviation for air-conditioning).
Second little exam, most gentle (8)
Bill's bored by river holidays (6)
I haven't cracked this one yet — but Fifteensquared have:
BEAK’S (bill = a bird’s beak), containing R (abbreviation for river).
500 waxwings regularly fly away when days break (5)
I haven't cracked this one yet — but Fifteensquared have:
D (500 in Roman numerals) + [w] A [x] W [i] N [g] S with alternate letters (regularly) “flying away”.
Nobleman years ahead of his time? (5)
Old, married group of Norwegians in the city (5)
I haven't cracked this one yet — but Fifteensquared have:
O (abbreviation for old) + M (abbreviation for married, especially in genealogical records) + A-HA (Norwegian synth-pop group from the 1980s, still active according to Wikipedia). City in Nebraska, US.
Genuine ceasefire excluding Crimea at first (4)
I haven't cracked this one yet — but Fifteensquared have:
TRU [c] E (ceasefire), without the C which is the first letter of C[rimea].
Type letters or click words in the clue