Scraps tools Bill offloaded (6)
I believe the answer is:
'scraps' is the definition.
(scrap can mean a brawl or fight)
'tools bill offloaded' is the wordplay.
'tools' becomes 'bradawls' (bradawl is a type of tool).
'bill' becomes 'ad' (advertisement stuck on wall).
'offloaded' indicates named letters should be taken away.
'bradawls' with 'ad' taken away is 'BRAWLS'.
(Other definitions for brawls that I've seen before include "Rough, noisy fights" , "Noisy quarrels or fights" , "Noisy free-for-alls" .)