Across
Flâneur openly taking in his surroundings, presumably (6)
New recruits mostly speak without thinking to begin with (8)
I haven't cracked this one yet — but Fifteensquared have:
CONVERS E (speak) excluding the final letter (mostly) E containing (without; outside) T ( first letter of [to begin with] T )
Recordings of United overwhelmed by Barcelona's cheers (6)
Reptile in trap to wriggle round here after shedding skin (8)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (to wiggle) IN TRAP containing (round) ER ( letters remaining in H ER E after the outer l etters H and E are removed [shedding skin])
Crew have to abandon second ship (5)
I haven't cracked this one yet — but Fifteensquared have:
POSSE SS (have) excluding [abandon] the second occurrence of SS (steamship)
Shoots, flowers, evergreen, peace at last (5,4)
I haven't cracked this one yet — but Fifteensquared have:
OPENS (flowers) + FIR (evergreen tree) + E ( final letter of [at last] PEAC E )
Parrot not quite as dead as a dodo? (7)
Olympians possibly left out of medals (4)
I haven't cracked this one yet — but Fifteensquared have:
GO L DS (medals, awarded as the Olympic Games for example) excluding (out of) L (left)
Try to find someone faithful using phone (4)
I haven't cracked this one yet — but Fifteensquared have:
SEEK ( sounds like [using phone] SIKH [adherent of the religion of the same name; someone faithful])
Throw out swimmer moving back to front (7)
I haven't cracked this one yet — but Fifteensquared have:
MANATE E (large aquatic herbivorous mammal; swimmer) with the final [back] E moving to the front [back to front] to form E MANATE
Dreadful private school grad with debts stuck outside No 10 (9)
I haven't cracked this one yet — but Fifteensquared have:
OB (Old Boy [graduate of a private school]- I’ve always assumed Old Boy could apply to someone who went to any school] + IOUS (I owe yous – debts]) containing (stuck outside) ( NO [number] + X [Roman numeral for 10])
Letter from Rolling Stone clutched by woman now and then (5)
Network when in lofty surroundings - might an icebreaker be useful there? (8)
Just about out of debt, with a few coins (6)
I haven't cracked this one yet — but Fifteensquared have:
A + FLOAT (money in hand for purposes, such as to give change to customers or to provide money for small expenses)
Sending water away, ordered red again – or a dear gin? (8)
Inscrutable setter's met with a lot of criticism (6)
I haven't cracked this one yet — but Fifteensquared have:
MY (setter’s) + STIC K (criticism) excluding the final letter (a lot of) K
Down
Cases of old politician popping into drinks (8)
I haven't cracked this one yet — but Fifteensquared have:
EX (former; old) + ( MP [Member of Parliament; politician] contained in [popping into] ALES [drinks])
Comes through or, alternatively, is routed (5,3)
Battering ram opened front (9)
Exaggerate somewhat, in more ways than one (4-3)
I haven't cracked this one yet — but Fifteensquared have:
OVER-EGG ( EGG is reversed [ OVER ] in EXA GGE RATE ) giving another way of cluing the answer
Upwardly mobile clergyman going to a load of balls in Pride and Prejudice? (5)
I haven't cracked this one yet — but Fifteensquared have:
REV ( REV erend; clergyman] reversed (upwardly mobile) + BS (bullshit; load of balls)
Republican instead of Democrat returned – fix! (6)
I haven't cracked this one yet — but Fifteensquared have:
REPAI D (returned [money, for example]) with R (Republican) replacing (instead of) D (Democrat) to form REPAI R
It's seventy feet but only one metre (6)
I haven't cracked this one yet — but Fifteensquared have:
SONNET (poem with one verse formed of 14 lines each with 5 feet [in this case, pairs of stressed and unstressed syllables – 14 * 5 =70) I’m no expert of feet and metres in poetry but there seems a slight confusion between the definitions I have used in the previous two lines. The first definition is from Chambers Dictionary and the second is from an explanation of feet in a SONNET from a web search.
A flat for one some singleton's flipped (4)
I haven't cracked this one yet — but Fifteensquared have:
NOTE ( reversed [flipped] hidden word in [some] SINGL ETON ‘S )
Insect to go slowly and then go quickly (9)
I haven't cracked this one yet — but Fifteensquared have:
DRAG ON (go slowly) + FLY (go quickly)
Amateur match official wearing protective gear – or not (8)
I haven't cracked this one yet — but Fifteensquared have:
( A [amateur] + REF [ REF eree {match official}]) contained in (wearing) BOOT (protective gear)
Perhaps it means, roughly, about meaning (8)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of (perhaps [?]) IT MEANS + C (circa; roughly; about)
Wise man wrapping present (7)
23d
(and 23 Down) Trouble with flies? A&E fixed up nether region (4,6)
I haven't cracked this one yet — but Fifteensquared have:
( AIL [trouble) + GNATS [small flies] + AE [ A and E ]) all reversed (fixed up; down entry)
Playwright crouched down to audience (6)
I haven't cracked this one yet — but Fifteensquared have:
COWARD (sounds like [to audience] COWERED [crouched or cringed in fear])
See 21 Down
Element of social media site nobody backed (5)
I haven't cracked this one yet — but Fifteensquared have:
X (social media site, formerly known as Twitter) + NONE (nobody} reversed (backed)
Type letters or click words in the clue