Unrefined fighting makes a comeback (3)
I believe the answer is:
raw
'unrefined' is the definition.
(I've seen this before)
'fighting makes a comeback' is the wordplay.
'fighting' becomes 'war'.
'makes a comeback' says the letters should be written backwards (I've seen 'making a comeback' mean this).
'war' backwards is 'RAW'.
(Other definitions for raw that I've seen before include "Unprocessed" , "Uncooked or unsophisticated" , "Uncooked or sore" , "Abraded" , "Bleeding" .)