7 down
Jump
in
as
there’s
plenty
that
does
this
(7)
Jump in as there’s plenty that does this (7)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Look at plenty that does this — that's your definition, since to abound is to exist in large numbers. For the wordplay, you take BOUND, meaning jump, and slip it inside A and S from as, giving you A-BOUND-S.