Abandon fight (5)
I believe the answer is:
scrap
I believe this is a double definition.
'abandon' is the first definition.
(I've seen this in another clue)
'fight' is the second definition.
(a scrap is a minor fight)
(Other definitions for scrap that I've seen before include "Fragment or remnant" , "Dispose of" , "Ditch - fight" , "Fight - morsel" , "Informal fight for waste material" .)