Leading trouble-maker (10)
I believe the answer is:
ringleader
(Other definitions for ringleader that I've seen before include "Chief troublemaker" , "firebrand" , "Mastermind" , "One heading up illicit activity" , "Main villain" .)
I believe the answer is:
ringleader
(Other definitions for ringleader that I've seen before include "Chief troublemaker" , "firebrand" , "Mastermind" , "One heading up illicit activity" , "Main villain" .)