Fisticuffs (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
fight
'fisticuffs' is the definition.
(fight is a kind of fisticuffs)
This is all the clue.
(Other definitions for fight that I've seen before include "Scrap" , "Bundle" , "Come to blows" , "Conflict" , "Brawl; argue" .)