Related Clues:

• "Hey, you!"
• Furtive whisper
• [Look over here!]
• 'Well, I'll be!'
• Sotto voce call
• Subtler alternative to 'Yo!'
• "Hey you!"
• 'Hey, buddy'
• Sound from an exam cheater
• 'Just as I thought!'
• "Want to hear a secret?"
• 'Caught ya!'
• Cry of insight
• Surprised shout
• Listen!