Across
Watercraft in choppy ocean (5)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (choppy) of OCEAN
She'll start constrained by that dodgy ratio (9)
Article by short doctor who wrote for legendary figure (7)
Liquid dye penetrating tiny aperture - that's revolutionary medicine (7)
Unusual rig a ruler reconstructed (9)
Ring queen then ring tech support? (5)
Ark sailor who might be on the radio (3)
Part of ankle tag went around old prison (7)
Finally wholeheartedly agree thus? (3)
I haven't cracked this one yet — but Fifteensquared have:
Last letters of wholeheartedl Y agre E thu S
Satiric comedian Bruce occasionally read clue in Indy (5)
I haven't cracked this one yet — but Fifteensquared have:
Alternate letters of c L u E i N i N d Y – I don’t know why the name of this satiric comedian , who died in 1966, was lodged in my brain but it popped up somehow
Inspire a German next to the bar when soused (9)
French sculptor sent us Saudi's piece (7)
Different man got Cher to edit out intros (7)
Famous footballer makes return accompanied by county trumpeters (9)
Worker in South America who climbs chimneys? (5)
Down
Northern miners ultimately like somewhere to sleep presumably? (8)
I haven't cracked this one yet — but Fifteensquared have:
[miner]S + COTTISH (like somewhere to sleep, presumably?)
On the run naked for a bet (4)
At intervals join G.I.'s lively manoeuvres (4)
I haven't cracked this one yet — but Fifteensquared have:
Alternate letters of J o I n G i’ S
Roughly translate first bits of Old Testament via Greek (10)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (translate) of O[ld] T[estament] VIA GREEK
Flier in back of book - it's beside fourth entry in index (4)
I haven't cracked this one yet — but Fifteensquared have:
[boo]K + IT, from the clue, plus the fourth letter of indEx
See pottery thrown for someone just how you'd expect (10)
A jolly irrational time to show body part (6)
I haven't cracked this one yet — but Fifteensquared have:
A RM (a ‘jolly’ – a slang nickname for a Royal Marine) + PI (irrational) + T (time)
Corps sent up info on cavalry's flanks in dire situation (9)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (sent up, in a down clue) of REME (The Royal Electrical and Mechanical Engineers – British Army corps) + GEN (info) + C[avalr]Y
Recalled small cars involved in retreat stopping abruptly (10)
Obedient City side accepts an offer (10)
I haven't cracked this one yet — but Fifteensquared have:
LA (city) + WING (side) round A BID (an offer) Just for fun, I googled ‘Obedient City’ and found this
Posers cut second drug for stoned Otis in NY borough (9)
Light blocked with this cures man in a bad way (8)
Rubbish bed (6)
Teacher's suppressing something that'll trouble the head? (4)
Couples in the middle of unwrapping presents in recess (4)
Worker dealt cards (4)
Type letters or click words in the clue