Queen occasionally insulted drunken hooligans (11)
I believe the answer is:
delinquents
'hooligans' is the definition.
(I have seen 'Young hooligans ' mean 'delinquents' so perhaps 'hooligans' could also mean 'delinquents')
'queen occasionally insulted drunken' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'drunken' is an anagram indicator.
The alternating letters of 'queen' are 'qen'.
'qen'+'insulted'='qeninsulted'
'qeninsulted' with letters rearranged gives 'DELINQUENTS'.
(Another definition for delinquents that I've seen is " Young hooligans".)