Fight for the discards (5)
I believe the answer is:
scrap
I believe this clue is a double definition.
'fight' is the first definition.
(thesaurus)
'the discards' is the second definition.
(thesaurus)
'for' is the link.
(Other definitions for scrap that I've seen before include "Small piece - fight" , "Axe" , "Cancel; fight" , "Dispose of" , "Break up - fight" .)