teaser

someone given to teasing (as by mocking or stirring curiosity)

a flat at each side of the stage to prevent the audience from seeing into the wings

a particularly baffling problem that is said to have a correct solution

a device for teasing wool

“a teaser is used to disentangle the fibers”

an advertisement that offers something free in order to arouse customers' interest

an attention-getting opening presented at the start of a television show

a worker who teases wool