Answer: showstopper

AnswerCrossword Clue
SHOWSTOPPER

Broadcasts a 1937 Cary Grant film?

SHOWSTOPPER

Dazzling performance

SHOWSTOPPER

It's spectacularly arresting

SHOWSTOPPER
"Memory," in "Cats," e.g.
SHOWSTOPPER
W?
SHOWSTOPPERAlmost any Merman number.
SHOWSTOPPERKind of act or song.
SHOWSTOPPERPopular act.
SHOWSTOPPERDazzling performer
SHOWSTOPPERDazzling Broadway performance