Across
Sweet, say, particularly covered in fluff (12)
I haven't cracked this one yet — but Fifteensquared have:
UTTER ("say") + sc . ("particularly") covered in BOTCH ("fluff")
Winter Olympian's weapon (5)
Folk hero made chips with silicon, say (9)
I haven't cracked this one yet — but Fifteensquared have:
FRIED ("made chips") with Si (chemical symbol for "silicon") + e.g. ("say")
Poorly, eyelid on the blink after end of operation (7)
I haven't cracked this one yet — but Fifteensquared have:
*(eyelid) [anag: on the blink ] after [ end of ] (operatio) N
15a
What might secure the bucks, ship bound for Madeira? (7,4)
Fallout from 12 15 (10)
See 12
21d
Slough crossed by rower, if old wizard on bridge playing role? (4,6)
Old pianist with cry of pain leaving Jack Sprat's wife? (4,6)
Unclosed box is in front of class (7)
7d
How might one force entry, murder getting a drink here? (7)
Comic, backing of scary woman by parliament (3,6)
I haven't cracked this one yet — but Fifteensquared have:
MEL B (aka Mel Brown or "Scary SPice", so "scary woman") backed by "parliament" of ROOKS
Celebrate elasticity in latex (5)
Macerate a substance picked after first of apples, most of the time (2,5,2,3)
I haven't cracked this one yet — but Fifteensquared have:
After [ first of ] A (pples), SOFTEN ("macerate") + A + SNOT ("substance picked")
Down
WW1 gun in comfortable position secured by a wedge from below (3,6)
Third rock's troubles irreversible, first of all: very sad about that (8)
I haven't cracked this one yet — but Fifteensquared have:
R (ock's) T (roubles) I (rreversible) [ first of all ] with TEARY ("very sad") about
Composition engaging swots, primarily, for example (5)
I haven't cracked this one yet — but Fifteensquared have:
E (ngaging) S (wots) [ primarily ] + SAY ("for example")
Birds gripped, stuffing is awful (9)
Distant workplace discussed by drunkard? (6)
I haven't cracked this one yet — but Fifteensquared have:
When slurring his words, a drunkard may pronounce OFFICE ("workplace") as OFFISH
Leader briefly annexing capital of large country (5)
I haven't cracked this one yet — but Fifteensquared have:
CHIE (f) ("leader", briefly ) annexing [ capital of ] L (arge)
See 24
Love of 10 pirouetted, often with some leaping (6)
The sad sculpture beneath which I must go? (9)
I haven't cracked this one yet — but Fifteensquared have:
*(the sad) [anag: sculpture ] beneath which ONE ("I")
Turning to blusher initially, ladies preening without foundation? (4,5)
Glower about a cut that's turned up in card game (8)
I haven't cracked this one yet — but Fifteensquared have:
NEON (gas, so "glower") about A + <=LOP ("cut", that's turned up )
Issue certainly not arising when expected (2,4)
I haven't cracked this one yet — but Fifteensquared have:
<=(EMIT ("issue") + NO ("certainly not"), rising )
Wonder when 2, all but its first and second failing (6)
See 18 Across
God, a hand perhaps skyward? (5)
I haven't cracked this one yet — but Fifteensquared have:
<=A SALT ("a hand, perhaps", skyward ), salt being a sailor
Puncture in fizzy drink can sprayed around holiday location (5,6)
Type letters or click words in the clue