Related Clues:

• Attention-getting sound
• ''Hey, bud!''
• Cousin of 'ahem'
• ''Hey, Mac!''
• Call for attention
• Head-turner
• Sibilant exclamation
• Call to share a secret?
• Verbal nudge
• Attention-getter, in the audience
• ''Hey, you!''
• 'Can you keep a secret?'
• Utterance during a play
• Subtle ''Over here!''
• It precedes 'Over here!'