Answer: onlooker

AnswerCrossword Clue
ONLOOKERNon-participant
ONLOOKERSpectator
ONLOOKERWitness
ONLOOKERSidewalk superintendent
ONLOOKEROne taking in a scene
ONLOOKERRubberneck
ONLOOKERSpectator.
ONLOOKERKibitzer.
ONLOOKEROne present but not participating
ONLOOKEROne on the sidelines
onlookerA nonparticipating observer; a spectator
onlookera spectator