Answer: showstopper

AnswerCrossword Clue
SHOWSTOPPERBroadcasts a 1937 Cary Grant film?
SHOWSTOPPERDazzling performance
SHOWSTOPPERIt's spectacularly arresting
SHOWSTOPPER"Memory," in "Cats," e.g.
SHOWSTOPPERW?
SHOWSTOPPERAlmost any Merman number.
SHOWSTOPPERKind of act or song.
SHOWSTOPPERPopular act.
SHOWSTOPPERDazzling performer
SHOWSTOPPERDazzling Broadway performance
showstoppera performer or performance that wins enthusiastic or prolonged applause