Answer: releaser

AnswerCrossword Clue
RELEASERWelcome sight to a POW
RELEASERDeliverer.
RELEASERFreer.
RELEASEROne that frees
RELEASERKey stimulus, in animal behavior
RELEASEROne opening a jail door, say
RELEASERIt lets things go
releaserperson or thing that releases
releaserkey stimulus, as a sound, odor, moving shape, or patch of color, that elicits a predictable behavioral response in an animal
releaserone who releases, also RELEASOR