Fragmented - or belligerent! (7)
I believe the answer is:
scrappy
I believe this is a double definition.
'fragmented' is the first definition.
(I've seen this before)
'belligerent' is the second definition.
(I've seen this in another clue)
'or' acts as a link.
(Other definitions for scrappy that I've seen before include "Fragmented" , "Fragmentary" , "Disjointed" , "disorganised" .)