Cooked steak and fish (5)
I believe the answer is:
skate
'fish' is the definition.
(skate is a kind of fish)
'cooked steak' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'steak' anagrammed gives 'SKATE'.
'and' is the link.
(Other definitions for skate that I've seen before include "current collector" , "Large edible ray" , "Flat fish" , "cross ice" , "Fish of ray family" .)