Any thug could be disobedient (7)
I believe the answer is:
naughty
'disobedient' is the definition.
(I've seen this before)
'any thug could be' is the wordplay.
'could be' indicates anagramming the letters.
'any'+'thug'='anythug'
'anythug' is an anagram of 'NAUGHTY'.
(Other definitions for naughty that I've seen before include "wayward" , "mildly indecent" , "Risqu" , "Badly behaved, mischievous" , "Mischievous - improper" .)