Related Clues:

• Verbal elbow?
• 'Sorry to intrude ...'
• [May I speak?]
• Subtle "Over here!"
• ''Do you mind?''
• "Listen up!"
• Start of a library volume discussion?
• "Yo, over here!"
• ''Um . . . excuse me''
• "Could we move on?"
• "Your fly is open" noise
• Hissed nudge
• Furtive "Yo!"
• Gentle interruption
• Sound of a break-in?