Answer: CAUSE

AnswerCrossword Clue
CAUSEDemonstration impetus
CAUSEJustification
CAUSEMovement
CAUSEUnderlying reason
CAUSESaving the whales, e.g.
CAUSE..-and-effect
CAUSE.. celebre
CAUSEEffect's mate
CAUSEPrinciple
CAUSECrusade
CAUSEMotivating issue
CAUSEPartner
CAUSEActivist's concern
CAUSEBring on
CAUSEReason why
CAUSETrigger
CAUSEInduce
CAUSEReply to "Why'd ya do that?"
CAUSERallying point
CAUSECharitable undertaking
causeperson or thing producing a result
CAUSEEffect preceder
CAUSESocial movement
CAUSESomething to believe in
CAUSEPrecipitate
CAUSEActivist's passion
CAUSEThing to rally behind
CAUSELead to
CAUSEReason
CAUSEBring about
CAUSESomething to fight for
CAUSEZealot's inspiration
CAUSEResult in
CAUSEEffect's partner
CAUSEIt may be lost or just
CAUSE"Rebel Without a ..."
CAUSEEffect, or effect's partner
CAUSEGive rise to
CAUSEMake happen
CAUSEGrounds