Fight for a bit (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)
'for a bit' is the second definition.
(synonyms)
(Other definitions for scrap that I've seen before include "Fight - morsel" , "Get rid of" , "Fragment or morsel" , "Small (leftover) piece" , "Just a fragment, maybe of food" .)