Small brawl (5)
'small brawl' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for scrap that I've seen before include "Axe" , "Leftover; fight" , "Informal fight for waste material" , "Small (leftover) piece" , "Cancel; fight" .)
(Other definitions for setto that I've seen before include "Start" , "battle" , "argument" , "Fight" .)