Related Clues:

• "May I have your attention" sound
• 'If I may interject ... '
• 'Shh!' relative
• "Shh!" relative
• Subtle "Excuse me . . ."
• Shout of protest
• Alternative to 'Psst!'
• Throaty "beg pardon . . ."
• 'That can't be right!'
• "Yo"
• A margin that's said to attract attention
• Contrived cough
• 'I'm right here'
• ''You forgot about me . . .''
• 'I'm standing right here'