Answer: crusader

AnswerCrossword Clue
CRUSADERNader, notably
crusaderto engage in a crusade
crusaderone who crusades (to engage in a holy war)
CRUSADEROne leading a fight for change
CRUSADERAcre man
CRUSADERChristian soldier
CRUSADERVigorous campaigner
CRUSADEROne on a mission
CRUSADERFollower of Richard the Lion-Hearted
CRUSADERFighter for a cause
CRUSADERPerson with a cause
CRUSADERChampion of a cause
CRUSADERPromoter of causes
CRUSADERMan with a mission.
CRUSADERTitle of TV program.
CRUSADERTancred was one.
CRUSADERRichard I, notably
CRUSADEROne with a cause