Eats surrounded by arguments and loud behaviour (9)
I believe the answer is:
rowdiness
'loud behaviour' is the definition.
(behaving loudly or rowdily)
'eats surrounded by arguments' is the wordplay.
'eats' becomes 'dines' (dining is a kind of eating).
'surrounded by' indicates putting letters inside.
'arguments' becomes 'rows' (I've seen this before).
'dines' going into 'rows' is 'ROWDINESS'.
'and' acts as a link.
(Other definitions for rowdiness that I've seen before include "bad behaviour" , "Wordiness leading to boisterous behaviour" , "Noise, disorder" , "Disorderly behaviour" , "yobbery" .)