Sunday Times Cryptic

[NeilMunro]

Very grateful for all help with these clues please.
1ac: “Chippy’s board left off fish (4).”
5dn: “Cakes filled with a hundred wicked things seen here (7).”
7dn: “Rifle fire by a parting force (7).”
14ac: “Chain, one that’s six feet, keeping large mammals back (6).”
20dn: “Course support needed tense university student (5).”

[Lie-in King]

1a Carp(enter) - a chippy, "board" left off
5d Sconces (for candles; wicked things) - 'C' (hundred, in) 'scones'
7d Ransack - 'a' (parting; in) 'R(oyal) N(avy)' (force) + 'sack' (fire)
14a Anklet - 'ant' ([ha]s six feet, keeping) 'elk' (back)
20d Tutee - 't(ense) u(ni) tee (course support)'

[NeilMunro]

Many thanks again!!!

[Lie-in King]

You're welcome :-)