Across
Money invested in Sussex town's bakery products (3,6)
I haven't cracked this one yet — but Fifteensquared have:
BREAD (money) ‘invested’ in RYE’S (Sussex town’s)
Gently turning about a copper coin (5)
I haven't cracked this one yet — but Fifteensquared have:
A reversal (‘turning’) of ON (about) A 1P (one penny – ‘copper coin’)
Understand only a small extract from strange text (3)
Swiss home of winger making regular appearances (6,5)
I haven't cracked this one yet — but Fifteensquared have:
A cryptic definition – CUCKOO CLOCKS typically come from Switzerland – the cuckoo appears regularly on the hour
Nipple rings are worn by leads in Eugene Onegin, Lohengrin and Aida (7)
I haven't cracked this one yet — but Fifteensquared have:
ARE round or ‘worn by’ E O L A (first letters or ‘leads’ in Eugene, Onedin, Lohengrin and Aida)
Police chief holding one end of rubber thing with unknown length (6)
I haven't cracked this one yet — but Fifteensquared have:
STING (lead singer or ‘chief’ in the band Police) round or ‘holding’ R (last letter or ‘end’ of rubber) – how long is a piece of string?
Something served in Grandma's house? (4)
Sealed by you in Senegal, a letter from abroad (3)
I haven't cracked this one yet — but Fifteensquared have:
A in or ‘sealed by’ TU (French, as spoken in Senegal, for ‘you’)
See 25 Down
Our colonel, leading in khaki? (6)
Great Victorian industrialist manufacturing plastic (7)
I haven't cracked this one yet — but Fifteensquared have:
ACE (great) TATE (Victorian industrialist – of Tate & Lyle and Tate Gallery fame)
Mass-produced article seen amongst rotten, decomposing flesh (3-3-5)
I haven't cracked this one yet — but Fifteensquared have:
THE (article) in or ‘seen amongst’ OFF (rotten) and an anagram (‘decomposing’) of FLESH
After 20, a fellow is a fool (3)
I haven't cracked this one yet — but Fifteensquared have:
O (nothing – 20 down) A F (fellow)
Head of Nike's in love with new fabric (5)
Express regret when first post office account is essentially discredited (9)
I haven't cracked this one yet — but Fifteensquared have:
A (first) PO (post office) LOG (account) IS E (middle or ‘essential’ letter of discredited)
Down
Friends, say, in favour of the metric system? (9)
I haven't cracked this one yet — but Fifteensquared have:
PRO (in favour of) GRAMME ((part of) the metric system) – we’re not happy with defining ‘gramme’ as ‘the metric system’
Layer upon layer of egg mayonnaise finally eaten by parents (8)
I haven't cracked this one yet — but Fifteensquared have:
E (last or ‘final’ letter or mayonnaise) in or ‘eaten by’ FATHERS (parents)
Notorious Transylvanian doctor pursued by a copper north of Los Angeles (7)
I haven't cracked this one yet — but Fifteensquared have:
DR (doctor) A CU (copper) LA (Los Angeles)
Close to Oldham, an English city (10)
I haven't cracked this one yet — but Fifteensquared have:
A clue-as-definition: M (last letter of Oldham) AN CHESTER (English city)
Place with dodgy loos (4)
Online photograph TikToker's first taken for foodie (7)
I haven't cracked this one yet — but Fifteensquared have:
E-PIC t URE (‘online photograph’) with the ‘t’ (first letter of Tik-Toker’s) missing or ‘taken’
Monkey bar broken by short kick (6)
Boxer at risk of toppling over? (5)
I haven't cracked this one yet — but Fifteensquared have:
Double definition
Pet with small gold/green tail (7,3)
Give smaller portions to United defender when injured (9)
I haven't cracked this one yet — but Fifteensquared have:
U (united) + an anagram (‘when injured’) of DEFENDER
Doughnut artist put doughnuts on another doughnut to create noted work (8)
I haven't cracked this one yet — but Fifteensquared have:
O (doughnut) RA (artist) TORI (doughnuts) O (doughnut)
A trifle disintegrating in thong (7)
Was the drink left by this type of dish? (7)
Kill and kill again, causing upset (6)
18a
(and 18 Across) Say "3, 2, 1 ... (9)
...blast off!" Abandon the first part of launch attempt (4)
Type letters or click words in the clue