Loudly stir up arguments (4)
I believe the answer is:
rows
'arguments' is the definition.
(I've seen this before)
'loudly stir up' is the wordplay.
'loudly' indicates a 'sounds like' (homophone) clue.
'stir up' becomes 'rouse' (I've seen this before).
'rouse' is a homophone of 'ROWS'.
(Other definitions for rows that I've seen before include "Uses oars" , "Columns" , "Arrangements side by side in lines" , "Banks" , "Disagreements" .)