Across
Less able to observe an outstanding performance (7)
Criticize the drink in French, causing stir (7)
A threesome that would control your life? (5)
Moderate version of Delft soap (4-5)
I haven't cracked this one yet — but Fifteensquared have:
definition: "Moderate" as a verb meaning 'tone down', diminish' anagram/"version" of (Delft soap)*
Isolation ruins Italy’s cooking (10)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"cooking" of (ruins Italy)*
Western power accepts one’s a weak type (4)
I haven't cracked this one yet — but Fifteensquared have:
W (Western) + P (power); both around/accepting I'M='I am'='one is'="one's"
Deacon’s lot is somehow sad (12)
Intimidation of Chief of Staff by Prudence on manoeuvres (5,7)
I haven't cracked this one yet — but Fifteensquared have:
the "Chief" or first letter of S-[taff] + CARE="Prudence" + TACTICS="manoeuvres"
See 23 Down
Unstable, so disillusioned with Equity (3,7)
Biblical wife breaking the Sabbath? Not at first (9)
I haven't cracked this one yet — but Fifteensquared have:
definition: wife of King David in the Bible [wiki] anagram/"breaking" of ([t]-he Sabbath)*, without the "first" of the letters for the anagram fodder
Mature mount (3,2)
Narrow arachnid squeezes into cap (7)
Where there might be a range of gear, hence endless changes (7)
I haven't cracked this one yet — but Fifteensquared have:
definition refers to a "range" as in a kitchen cooker/oven KIT="gear" plus anagram/"changes" of (henc-[e])* without its end letter
Down
Research expert Dicky gets stuck into container (6)
One question on tax that shows how smart you are? (2,4)
I haven't cracked this one yet — but Fifteensquared have:
I="One" + Q (question) + TEST="tax" as a verb
Denial of miracle is revised after departure (10)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"revised" of (miracle is)*, after D (departure)
One emerging from the sack found on the stair (5)
Splayed feet – nasty, but a tightrope walker’s requirement? (6,3)
I haven't cracked this one yet — but Fifteensquared have:
anagram/"Splayed" of (feet nasty)*
Peaks since holding record (4)
Song from Ratty, Kit and half a countertenor (8)
Slipped back (rush to guzzle drinks) (8)
Handy illumination if right cloth is spread (10)
I haven't cracked this one yet — but Fifteensquared have:
for the definition, "Handy" meaning 'held in the hand' anagram/"spread" of (right cloth)*
Michael Caine’s part in raw fuel source (9)
‘City Lives’ by Brown & Bigness (not King) (8)
Information? Ring corporation’s multitasking employee (8)
I haven't cracked this one yet — but Fifteensquared have:
FACT="Information" + O=circle="Ring" + TUM=belly="corporation"
Kidnap head of state? Certainly (6)
News during Christmas about former famous group member (6)
I haven't cracked this one yet — but Fifteensquared have:
definition: John Lennon of the Beatles N (new) + N (new) are "New-s", inside NOEL="Christmas" reversed/"about"
21a
Bad spelling etc creates shortage in London hospital (5,4)
A word in your ear: not all chaps stink! (4)
Type letters or click words in the clue