Related Clues:

• 'Over here ...'
• It precedes "Over here!"
• 'Over here, buddy'
• [Nudge]
• ''Sorry to interrupt . . .''
• ''Um, excuse me . . .''
• Audible nudge
• Subtle warning sound
• Subtler alternative to "Yo!"
• "Do you want to hear a secret?"
• Utterance before passing a note, maybe
• Covert attention-getter
• Low-key "Hey!"
• "Could I interject?"
• Sibilant "Ahem!"