Answer: dogwhistle

AnswerCrossword Clue
DOGWHISTLE

"Silent" pooch summoner

DOGWHISTLE

On occasion, what Timmy used to call Lassie

DOGWHISTLE

Pet-store purchase

DOGWHISTLE
Item used with high frequency?
DOGWHISTLE
Canine training device
DOGWHISTLEHigh-pitched signal device
DOGWHISTLESpot summoner