teaser

noun

1. a worker who teases wool
2. someone given to teasing (as by mocking or stirring curiosity)
3. an advertisement that offers something free in order to arouse customers' interest
4. a particularly baffling problem that is said to have a correct solution"he loved to solve chessmate puzzles"
5. an attention-getting opening presented at the start of a television show
6. a flat at each side of the stage to prevent the audience from seeing into the wings
7. a device for teasing wool"a teaser is used to disentangle the fibers"