Related Clues:

• Secretive attention-getter
• Subtle call for attention
• Kiss interrupter, maybe
• "If I may butt in ..."
• Alternative to an elbow
• Test cheater's sound
• "Beg your pardon ... "
• Relative of 'Hey, ma'
• ''If I may interject . . .''
• "Hey, listen up!"
• Opens all higher education mail? It needs to be said to avoid congestion!
• Quiet supersonic transport is an attention grabber
• A borderline call attracting attention
• This draws attention, and gives you an edge
• Exclamation attracting attention