Related Clues:

• Listen!
• Verbal jab in the ribs
• 'You there!'
• Attention-getting call
• "Hey, Mister!"
• Clandestine signal
• Surreptitious sound
• "Hey, Mac!"
• Secretive attention getter
• Fence’s utterance
• 'Hey, over here!'
• "Hey there!"
• Furtive "Hey!"
• "Yo!"
• "Over here," quietly