Fish swimming around hooks (3)
I believe the answer is:
gar
'fish' is the definition.
(type of gar)
'swimming around hooks' is the wordplay.
'hooks' indicates a hidden word (the answer is held or hooked within the clue).
'GAR' is hidden in the letters of 'swimming around'.
(Other definitions for gar that I've seen before include "Type of fish" , "something fishy here" , "Pike-like fish" , "Creature" , "A fish; cloth scrap (reversed)" .)