Quarrel about a scarf (6)
I believe the answer is:
fracas
'quarrel' is the definition.
(fracas is a kind of quarrel)
'about a scarf' is the wordplay.
'about' indicates an anagram.
'a'+'scarf'='ascarf'
'ascarf' anagrammed gives 'FRACAS'.
(Other definitions for fracas that I've seen before include "A scarf (anag)" , "Uproar - brawl" , "Trouble" , "Brawl, disturbance" , "Noisy altercation" .)