Answer: dogwhistle

AnswerCrossword Clue
DOGWHISTLE"Silent" pooch summoner
DOGWHISTLEOn occasion, what Timmy used to call Lassie
DOGWHISTLEPet-store purchase
DOGWHISTLEItem used with high frequency?
DOGWHISTLECanine training device
DOGWHISTLEHigh-pitched signal device
DOGWHISTLESpot summoner