Across
Friend’s securing check after check – he wins lots, ultimately, in these (5,7)
Some farmer in search for swill (5)
Experimental area: year in this removing one’s perplexity (9)
I haven't cracked this one yet — but Fifteensquared have:
LAB (experimental area) + YR + IN THIS less I’S
Trees beside end of street likely gutted at the outset (7)
I haven't cracked this one yet — but Fifteensquared have:
FIRS (trees) + [stree]T + L[ikel]Y
Island I found surrounded by fish in part of Africa (7)
I haven't cracked this one yet — but Fifteensquared have:
IS (island) + I in TUNA
Sadly values-lite, like much broadcasting (10)
Committed pupil pulls back (4)
This gin gets legions drunk (4)
I haven't cracked this one yet — but Fifteensquared have:
This is what is called a “composite anagram &lit” in some circles: LEGIONS is an anagram of SLOE GIN, and the whole clue is the definition
Ageing somehow seen linked to knowledge I released (10)
Rebuke? Republican hitting ceiling (7)
Old still beer getting mark with pen (7)
I haven't cracked this one yet — but Fifteensquared have:
ALE + M[ark] + BIC (brand of pen); although it looks as if it should be an adjective, alembic is actually a name for an “old-fashioned type of distilling apparatus”, used in alchemy
Thumps one with Guardian heartlessly – it’s a mark of the Greens? (5,4)
I haven't cracked this one yet — but Fifteensquared have:
POUNDS (thumps) + I (one) + G[uardia]N, with “Greens” meaning mony
Flower from old times getting attention (2-3)
Yes, bad mood may be aggravated by merely adequate historic records (8,4)
Down
Singer’s reduced mastery around key (9)
Optional having European active around English court (8)
Light carriage being put out? (5)
Judge Australia to have right measure of information supply (9)
I haven't cracked this one yet — but Fifteensquared have:
A + R + BIT-RATE (the rate of transmission of data, so a measure of information supply)
Expression of surprise regarding one feature of daffodil (6)
Holderness home to these seabirds? (5)
Supportive of appropriate gain (6)
Prevent hot fighting in midst of battle (6)
I haven't cracked this one yet — but Fifteensquared have:
H[ot] WAR in [ba]TT[le]
Wagner opera is upsetting for one supporter withdrawing name (9)
Beach feature to coil on vacation (9)
Image of Jesus church’s taken in two ways – half holy, half mock (4,4)
Informant about your University is unnaturally sweet (6)
I haven't cracked this one yet — but Fifteensquared have:
YR (your) U[niversity] in SPY
Repudiate key source of hope we elevated (6)
I haven't cracked this one yet — but Fifteensquared have:
ESC (another computer key) + H[ope] + reverse of WE
One fond of chow initially fond of cartoon dog … (6)
… cartoon dog left in position with repeated character in cartoon (5)
I haven't cracked this one yet — but Fifteensquared have:
L in PUT (to position) + O (the double letter in cartOOn)
Upset speaker after cutting off opening (5)
I haven't cracked this one yet — but Fifteensquared have:
A headless TANNOY
Type letters or click words in the clue