Thug or lout (8)
I believe the answer is:
hooligan
This clue is a double definition.
'thug' is the first definition.
(I've seen this before)
'lout' is the second definition.
(I've seen this before)
(Other definitions for hooligan that I've seen before include "Destructive or badly-behaved youth" , "Tough" , "Lawless type" , "Undesirable" , "Antisocial rough" .)