Any thug turned out to be disobedient (7)
I believe the answer is:
naughty
'be disobedient' is the definition.
(thesaurus)
'any thug turned out' is the wordplay.
'turned out' indicates an anagram.
'any'+'thug'='anythug'
'anythug' anagrammed gives 'NAUGHTY'.
'to' is the link.
(Other definitions for naughty that I've seen before include "Badly behaved, mischievous" , "titillating" , "Dubious" , "Disobedient, child perhaps" , "wayward" .)