Refuse to fight (5)
I believe the answer is:
scrap
I believe this is a double definition.
'refuse' is the first definition.
(thesaurus)
'fight' is the second definition.
(a scrap is a minor fight)
'to' acts as a link.
(Other definitions for scrap that I've seen before include "Small amount; fight" , "Axe" , "Fight - morsel" , "Tussle over junk metal?" , "Small piece; abolish" .)