Fish stuffed with raw minced chicken (6)
I believe the answer is:
coward
'chicken' is the definition.
('coward' can be similar in meaning to 'chicken')
'fish stuffed with raw minced' is the wordplay.
'fish' becomes 'cod' (cod is a kind of fish).
'stuffed with' means one lot of letters goes inside another (I've seen this in other clues).
'minced' indicates anagramming the letters.
'raw' with letters rearranged gives 'war'.
'cod' placed around 'war' is 'COWARD'.
(Other definitions for coward that I've seen before include "Poltroon" , "Blithe Spirit playwright" , "Person who is excessively fearful, lacks courage" , "Gutless type" , "Person without courage" .)