Nude back to stuff fish and chicken (6)
I believe the answer is:
coward
'chicken' is the definition.
(similar in meaning)
'nude back to stuff fish' is the wordplay.
'nude' becomes 'raw'.
'back' says the letters should be written backwards.
'to stuff' means one lot of letters goes inside another.
'fish' becomes 'cod' (type of fish).
'raw' written backwards gives 'war'.
'war' inserted into 'cod' is 'COWARD'.
'and' is the link.
(Other definitions for coward that I've seen before include "Mad Dogs and Englishmen songwriter" , "Chicken" , "Yellow type" , "A craven person" , "Person who is excessively fearful, lacks courage" .)