Slanging match (4-5)
I believe the answer is:
argy-bargy
'slanging match' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for argy-bargy that I've seen before include "Noisy wranglings" , "Slanging match" , "Much wrangling" , "Noisy altercation" , "Verbal dispute" .)