Mischievous, disobedient (7)
I believe the answer is:
naughty
I believe this clue is a double definition.
'mischievous' is the first definition.
(synonyms)
'disobedient' is the second definition.
(I've seen this before)
(Other definitions for naughty that I've seen before include "Badly behaved, child say" , "Dubious" , "Wicked" , "wayward" , "Sinful" .)