Answer: procession

AnswerCrossword Clue
PROCESSIONMotorcade, e.g.
PROCESSIONCommencement event.
PROCESSIONParade
PROCESSIONCavalcade
processionA number of people or vehicles moving forward in an orderly fashion, esp. as part of a ceremony or festival
processionThe action of moving forward in such a way
processionto go in procession
processionThe emanation of the Holy Spirit
processionA relentless succession of people or things