Not real fish (3)
I believe the answer is:
cod
This clue might be a double definition.
'not real' is the first definition.
Both the definition and answer are adjectives. Maybe there's an association between them I don't understand?
'fish' is the second definition.
(cod is a kind of fish)
Can you help me to learn more?
(Other definitions for cod that I've seen before include "catch!" , "One caught in the deep maybe" , "Not a real" , "faked" , "A joke of a fish?" .)