Related Clues:

• Negate a conviction
• 'Hey you!'
• Whispered sound
• Street peddler's opener?
• Attention getter
• 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