Across
Back end of chestnut horse given stroke (9)
Drifters' intro missing instruments (5)
I haven't cracked this one yet — but Fifteensquared have:
h OBOES (drifters) missing the first letter or ‘intro’
Run over sickly tree (5)
Old keg treated with new understanding (9)
Answer briefly as before: Bother! (3)
Crop's yielding least essentially reduced by 99% (7)
I haven't cracked this one yet — but Fifteensquared have:
HAR d EST (‘yielding least’) with the middle or ‘essential’ letter ‘d’ (500 in Roman numerals) changed to V (5) or ‘reduced by 99%’
Fellow tailing May Queen's close (3)
American spared by virus with spirit intact (6)
Singular actor headed season (6)
General's quick to reject outsiders (3)
I haven't cracked this one yet — but Fifteensquared have:
f LEE t (quick) missing the first and last letters or ‘rejecting outsiders’
Boxed posh goods carried by sleigh (7)
I haven't cracked this one yet — but Fifteensquared have:
U (posh) G G (‘goods’) in or ‘carried by’ SLED (sleigh)
Teacher to some extent rebuffed Christian (3)
If car's faltering on ice give up (9)
G W Bush occasionally visited an Eastern city (5)
I haven't cracked this one yet — but Fifteensquared have:
Alternate or ‘occasional’ letters of g W bUsH + AN
Very boring dance party (5)
One lining wheel of new turbine wasted energy (9)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (‘wasted’) of N (new) and TURBINE + E (energy)
Down
Pro succeeded with reconfiguration and ran accessory for Mac? (7)
I haven't cracked this one yet — but Fifteensquared have:
An anagram (‘with reconfiguration’) of PRO and S (succeeded) + RAN
Vehicle's second phone now installed (10)
Feature trousers one third off (4)
I haven't cracked this one yet — but Fifteensquared have:
CHIN os (trousers) missing the last two letters or ‘one third off’
It's possibly willow that supplies flame I'm not sure (6)
Cultists vote to stop rearing children (8)
I haven't cracked this one yet — but Fifteensquared have:
VOTE in or ‘stopping’ a reversal (‘rearing’) of SEED (children)
Sweet trifle (4)
Court date for driver? (4)
A grim location for a wake (6)
I haven't cracked this one yet — but Fifteensquared have:
A STERN (grim)
Peaks hotel seems miserable denied the early sun (5)
Nervous tense setter's supported by papers (5)
I haven't cracked this one yet — but Fifteensquared have:
T (tense) I’M (‘setter’s’) ID (papers)
Mum searched frantically wanting diameter for pipe (10)
An inflammatory state it's adjoining Northern Europe (8)
I haven't cracked this one yet — but Fifteensquared have:
IT IS after or ‘adjoining’ N (northern) EUR (Europe)
She may have claret served up containing some ice (7)
I haven't cracked this one yet — but Fifteensquared have:
A clue-as-definition: a reversal (‘served up’) of RED (claret) round or ‘containing’ RINK (‘some ice’)
Brightness and passion shown by engineers (6)
Leaves cash for American politicians (6)
I haven't cracked this one yet — but Fifteensquared have:
Triple definition
It might provide shelter from cold hail (4)
Principally intrepid sergeant loses everything in 4D/16A setting (4)
I haven't cracked this one yet — but Fifteensquared have:
First or ‘principal’ letters of Intrepid Sergeant Loses Everything – the film ‘Wicker Man’ (4D/16ac) is set on a Scottish Isle and features an ‘intrepid sergeant’ who ‘loses everything’
Charge patients here? (4)
Type letters or click words in the clue