Across
Odd shuffling very large old animals (5)
One clicks what St Peter might have done (8)
I haven't cracked this one yet — but Fifteensquared have:
St Peter was a fisherman, so he might have CAST A NET
I conquered, so cleric negotiated with us, leading to ever-worsening situations (7,7)
Nodding head at priestess before noon (8)
I haven't cracked this one yet — but Fifteensquared have:
NUT (head) + AT + IO (mythological priestess) + N. Nutation is a “nodding” motion seen e.g. in the rotation of the earth
Hey __ __ swindle! (6)
I haven't cracked this one yet — but Fifteensquared have:
Filling in the blanks gives us “Hey Diddle Diddle”, as in the nursery rhyme
Dismisses Let It Be: Beatles’ fifth and last hit (9)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of LET IT BE + the fifth and last letters of beatLeS
Praise the guts of fiery boxer, beating stout fellows (5)
I haven't cracked this one yet — but Fifteensquared have:
Central letters of fiEry boXer beaTing stOut felLows
Set aside a returned Bath bun Sally’s not wanted (5)
I haven't cracked this one yet — but Fifteensquared have:
A + reverse of LUNN: a Sally Lunn is a kind of bun
Redcoat, before gaiety in Telford, spent money intended for someone else (5,4)
I haven't cracked this one yet — but Fifteensquared have:
RUST (a “red coat”) + FUN in T[elfor]D, “spent” indicating that we should remove the inner letters
Sour fruit contributed by mother and child (6)
Wrong to take over from 20 with a Scotsman (8)
I haven't cracked this one yet — but Fifteensquared have:
MOIST (20d) less O[ver] + A KEN
In this you won't find solutions for 21 down and 13 across (4,5,5)
A string’s bent by the ninth one? (4,4)
I haven't cracked this one yet — but Fifteensquared have:
(A STRING’S)* – the ninth zodiac sign is Sagittarius, the archer, who might bend a string on his bow
Registers works (5)
Down
Almost entirely foresee GB rower Redgrave’s third son jumping from these? (6,6)
I haven't cracked this one yet — but Fifteensquared have:
DIVIN[e] (foresee) + GB + OAR (rower) + third letter of reDgrave + S[on] – I was hoping for an amazing &lit reading, but Sir Steve Redgrave only has one son, and he is a rugby player
Remove moggies, discharging a fire extinguisher — it’s all kinds of sport! (9)
I haven't cracked this one yet — but Fifteensquared have:
DE-CAT (remove moggies) + HALON (gas used as a fire extinguisher) less A
Swimming salmon mate — oddly, this is the result (5)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of odd letters of SaLmOn MaTe – smolt is a young salmon
Lost cause in preparation? Not if you’re hungry (9)
Fastens up slit (4)
One plans development of the Arctic (9)
My boss accepts people to do what subeditors do (5)
Showgirls (or Morris men?) (5,7)
I haven't cracked this one yet — but Fifteensquared have:
Morris men have bells attached to their costumes, so they are BELL-Y DANCERS
Difficult request: a bit of buttered roll? A toastie’s offered up (4,5)
French food ordered in Sanssouci (9)
Old long-distance communication could be a trumpet (5,4)
I haven't cracked this one yet — but Fifteensquared have:
A trumpet can be an elephant’s call, made by its trunk
First chases second, being tearful (5)
I haven't cracked this one yet — but Fifteensquared have:
MO (second) + 1st
I engaged in diplomacy without speaking (5)
I haven't cracked this one yet — but Fifteensquared have:
I in TACT
Do you know what sushi rolls are wrapped in? Me neither! (4)
I haven't cracked this one yet — but Fifteensquared have:
Me neither = NOR I
Type letters or click words in the clue