A bit of a fracas (5)
I believe the answer is:
scrap
I believe this is a double definition.
'a bit of' is the first definition.
(I've seen this before)
'a fracas' is the second definition.
(I've seen this in another clue)
(Other definitions for scrap that I've seen before include "Small (leftover) piece" , "Waste metal or slang fight" , "Dispense with - waste material" , "A fragment or an informal fight" , "Fight; abolish" .)