Crossword Clue:

Person with a cause

AnswerCrossword Clue
ZEALOTPerson with a cause
CRUSADERPerson with a cause
INSOMNIACPerson with no cause for alarm?
REBELPerson without a cause
POSTERCHILDPerson who embodies a cause
ZEALArdor for a person or cause.