Related Clues:

• Covert 'Over here!'
• Shush
• 'May I interrupt?' sound
• Subtler 'Hey you!'
• 'Can I get a word in here?'
• "Can I get a word in here?"
• 'Psst' cousin
• Quiet 'Hey, you!'
• Whispered bid for attention
• One's on edge — pardon me
• "Hey, there!" softly
• Secretive "Look here"
• Note-passer's sound
• Attention-grabbing expression
• "If I may intrude ... "