Troublemaker co-partner at Vogue sacked (5,11)
I believe the answer is:
agent provocateur
'troublemaker' is the definition.
(thesaurus)
'co-partner at vogue sacked' is the wordplay.
'sacked' is an anagram indicator (sack can mean to plunder or destroy).
'co'+'partner'+'at'+'vogue'='copartneratvogue'
'copartneratvogue' anagrammed gives 'AGENT PROVOCATEUR'.
(Other definitions for agent provocateur that I've seen before include "One who stirs up trouble" , "One employed to incite others to commit illegal acts" .)