Loutishness (7)
I believe the answer is:
yobbery
'loutishness' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for yobbery that I've seen before include "Rude noisy behaviour" , "Loutishness" , "Loutish behaviour" , "Beer-fuelled behaviour" , "Inclination to act loutishly" .)