Across
Birds on seaside spot to start with, eating what they eat (7)
I haven't cracked this one yet — but Fifteensquared have:
PREY (what ospreys eat) in first letters of On Seaside Spot
Dealing with cake that's seasonal without filling and topping (7)
I haven't cracked this one yet — but Fifteensquared have:
S[easona]L + ICING (topping of a cake)
Singer keen to make a comeback (4)
To split up and desert over the onset of marriage is an idealised vision (10)
I haven't cracked this one yet — but Fifteensquared have:
TO in UP + reverse of SINAI (desert) + M[arriage]
Testament featuring male member in bloomers (6)
I haven't cracked this one yet — but Fifteensquared have:
Hdden in teSTAMENt
Followed the example of having dealt poorly with bird (8)
Regular light infantry starts out with one who doesn't belong (9)
I haven't cracked this one yet — but Fifteensquared have:
Anagram of REGULAR L[ight] I[nfantry]
Entanglements from speed (5)
Sharp causing laceration in casualty (5)
I haven't cracked this one yet — but Fifteensquared have:
CUT (laceration) in A [and] E
Much arena activity for us (5,4)
A badge for fooling around? (8)
I haven't cracked this one yet — but Fifteensquared have:
A BADGE is literally BAD in AGE
Appetiser is able to simulate (6)
One of 16 churches: the first welcomes love, the second follows it (5,5)
I haven't cracked this one yet — but Fifteensquared have:
LOVE in CH + IT + CH. The clove hitch is a kind of KNOT
See 7 Down
Futile to cut back (7)
Drama writer's safe space (7)
Down
Dog caught in awful menagerie (7)
Realism is lost in this field (5)
I haven't cracked this one yet — but Fifteensquared have:
REALISM less IS
We read out a couple of letters (3,3,1)
Face being sick in bed? (4,2)
27a
Vessel or two (9,4)
Whiff of sodium is emerging (7)
Like Euler, a notable original! (5,8)
Bringing back earlier TV production (9)
Wine and tea and endless joy (7)
Booze trashed what's within school walls (7)
Covers eyes, we hear, to turn over (7)
Don't start arguments and beatings (6)
Finally clean a dirty place that's vile (5)
I haven't cracked this one yet — but Fifteensquared have:
[clea]N A STY
Type letters or click words in the clue