a·gent pro·vo·ca·teur 
(ă-zhäɴ′ prô-vô′kä-tœr)
(ă-zhäɴ′ prô-vô′kä-tœr)n. pl. a·gents pro·vo·ca·teurs (ă-zhäɴ′ prô-vô′kä-tœr)
A person employed to associate with suspected individuals or groups with the purpose of inciting them to commit acts that will make them liable to punishment.
[French : agent, agent + provocateur, instigator.]