Across
Regret nothing after short time, sweetheart (4-4)
Expert solver of clues needs extra, consuming seconds (5)
I haven't cracked this one yet — but Fifteensquared have:
S in MORE. The solver is Inspector Morse, or possibly the real-life solver Sir Jeremy Morse, after whom the detective was named
Take part in taste test, etc. sooner or later? Don’t touch it (4)
King and I protected by partners in terms of wealth (10)
I haven't cracked this one yet — but Fifteensquared have:
R + I in MATE + ALLY (two partners)
Far from sweet superpower, onetime ally turned deadly foe (6)
Chapter penned by a competitor relating to record collection (8)
I haven't cracked this one yet — but Fifteensquared have:
CH in A RIVAL
Bad men I see? (7)
Run into fanatics, members of religious society (7)
I haven't cracked this one yet — but Fifteensquared have:
R in FIENDS
Striker’s corrupt power ensnaring everyone (8)
Wild dog you almost trapped in sheep pen (6)
Central American native reportedly went on racehorse (10)
Length once more uncompleted in part of pool (4)
Oxford writer in North Island (5)
Master criminal orchestrated army riot (8)
Down
Comrades almost chucked in firearm (8)
Part of England Scots understood (4)
Detective returns to familiar territory in hearing (6)
Otherwise learnt outside University, unlike 15 or 17 (7)
I haven't cracked this one yet — but Fifteensquared have:
U in LEARNT*
Affectionate type picking me up with Dutch courage (8)
Reveal city must be reconstructed in original way (10)
Concrete help for teaching about others (6)
Corporation showed sign of cut – admit it’s in very bad shape (10)
Stylized language I use with umph, bizarrely (8)
Set off with girlfriend outside boys’ school (8)
Hiding name, discharge Brendan’s buddy? Not always (7)
I haven't cracked this one yet — but Fifteensquared have:
N[ame] in FREE MY (Brendan’s)
Learner in a sport becoming top Olympian (6)
I haven't cracked this one yet — but Fifteensquared have:
L in A POLO
A doctor finally got in antidote for poison (6)
I haven't cracked this one yet — but Fifteensquared have:
A [docto]R in CURE
King Edward the humorist (4)
Type letters or click words in the clue