Someone or something who barks. Example: My neighbor's dog is a constant barker that keeps me awake at night.
A person employed to solicit customers by calling out to passersby, e.g. at a carnival. Example: Bob had amassed a considerable stockpile of double entendres from his days working as a barker for a strip joint.
A shelf-talker.
A video game mode where the action is demonstrated to entice someone to play the game. Example: The barker mode of the arcade video game convinced the teenager to spend a quarter.
A pistol.
The spotted redshank.
All clues having "BARKER"
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