Answer:

firebrand

AnswerCrossword Clue
FIREBRANDPerson who stirs up strife.
FIREBRANDHuman spark plug.
FIREBRANDTroublemaker
FIREBRANDRebellion inciter
FIREBRANDRabble-rouser
FIREBRANDAgitator seeking radical change