Fish similar to cod (4)
I believe the answer is:
hake
'fish similar to cod' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hake that I've seen before include "Type of fish" , "Cod-like fish" , "Food fish; rhymes with create" , "Common food fish" , "Food fish related to the cod" .)