Across
Burn old note to make a gesture (6)
I haven't cracked this one yet — but Fifteensquared have:
BECK [burn – both Northern words for a stream] + O [old] + N [note]
Sacked a politician for inflammatory release (8)
Agent without sleep is irritable (6)
Recommend against commander breaking an engagement (8)
I haven't cracked this one yet — but Fifteensquared have:
V [against] + OC [commander] in A DATE [an engagement]
Suggestive of the latest wrap-around dresses (11)
Nun died tragically in New Zealand (7)
Philosopher behaved without sin? First class! (7)
I haven't cracked this one yet — but Fifteensquared have:
DID [behaved] round ERR [sin] + A [first class]
Supply post providing grub (11)
Dismissed with less than player in game (8)
I haven't cracked this one yet — but Fifteensquared have:
R O [run out – dismissed – in cricket] + UNDER [less than] + S [player? – in bridge? – they usually come as ‘partners’ in crosswords: I’m not sure about this
Conflict by the sea, briefly gave enthusiasm (6)
Hear a gun going off in lecture (8)
More enthusiastic mourner (6)
Down
Officer knowledgeable about voucher (6)
Collier harbours terror of psychic (4-6)
Concerned with stout correspondent (8)
Dominate finest horse (8)
Caught spoiling sweet (8)
I haven't cracked this one yet — but Fifteensquared have:
C [caught] + HARMING [spoiling]
A crazy, upwardly mobile architect (4)
Look both ways (4)
I haven't cracked this one yet — but Fifteensquared have:
A palindrome
Our stamina is restored here (10)
Soldier to sack valet (8)
Boy embraces supporter winning gold in Canada (8)
I haven't cracked this one yet — but Fifteensquared have:
LAD [boy] round BRA [supporter] + OR [gold] – see comment on 15ac
Some years with conservation group are corrupt (8)
I haven't cracked this one yet — but Fifteensquared have:
DECADE [some years] + N[ational] T[rust] [conservation group]
One man takes a long time producing artistic works (6)
I haven't cracked this one yet — but Fifteensquared have:
I [one] M [man?] + AGES
Knowing some nuclear chemistry (4)
Pulled up car making low vibrant sound (4)
Type letters or click words in the clue