Related Clues:

• Sound that turns some heads
• Soft "hey, you"
• Clandestine attention-getting sound
• Sound heard by an exam proctor, say
• 'Hey, over here'
• Quiet sound that can mean "Look here!"
• Barely audible "Hey!"
• Quiet attention-seeker
• Sound from a would-be test cheater?
• Head-turning "over here" sound
• Revelation preceder, at times
• "Look over here" sound
• 'Hey, get a load of this'
• "Hey, get a load of this"
• Subtle alternative to 'Hey you!'