Related Clues:

• Attention getter
• 'Now I understand!'
• Melodramatic cry
• Attention-getting sound
• Cry of recognition
• ''Well, what do you know!''
• 'So that's your secret!'
• ''Hey, bud!''
• Cousin of 'ahem'
• ''Hey, Mac!''
• 'So there you are!'
• Call for attention
• Head-turner
• Sibilant exclamation
• Expression of surprise