Fight or fragment (5)
I believe the answer is:
scrap
I believe this is a double definition.
'fight' is the first definition.
(a scrap is a minor fight)
'fragment' is the second definition.
(I know that scrap is a type of fragment)
(Other definitions for scrap that I've seen before include "Discard the small fragment" , "A fragment or an informal fight" , "Turn into refuse" , "Abolish; leftover" , "Waste metal or slang fight" .)