Answer: finder

AnswerCrossword Clue
FINDERDetective, at times
findercamera part enabling a photographer to see what will be included in a picture
finderperson or thing that locates or finds someone or something
finderone that finds
finderagent that initiates business transactions
findersmall astronomical telescope of low power and wide field attached to a larger telescope for finding an object
findersmall, wide-angled telescope attached to a larger one for aiming it at objects
finderrange finder
finderewfinder
finderone that finds (to come upon after a search)
FINDERHe's a keeper, according to an adage
FINDERKeeper, so it's said
FINDEROne earning a fee, maybe
FINDERLocator
FINDERDetective, essentially
FINDERCamera part.
FINDERCamera device.
FINDERCamera attachment.
FINDERDiscoverer.
FINDERSuccessful searcher
FINDERKeeper, according to a saying