Related Clues:
- Surreptitious signal
- 'Hey ... kid'
- ''C'mere!''
- "Ahem" alternative
- Discreet utterance
- Attention-grabbing sound
- "Hey," the quiet way
- Secret indicator
- Whispered ''Hey you!''
- 'Uh, excuse me ...'
- Breaking-in sound
- Throaty cousin of "psst!"
- ''Excuse me . . .''
- Alternative to being tapped
- "Can I cut in?" noise