Related Clues:
- 'Hey ... you'
- "Hey, buddy!"
- Sibilant sound to attract attention furtively
- Sound of call to hear a secret
- Whispered exclamation to attract attention
- Sibilant whisper to attract attention
- Sibilant interjection to call attention
- Sibilant sound made to attract attention
- Sound to call quietly
- Soft sound to get someone's attention
- Whispered attention-getter
- Whispered message lead-in, perhaps
- Cheater's whisper
- Surreptitious summons
- Conspiratorial "Hey!"