Related Clues:
- 'Hey ... have I got a deal for you!'
- 'Yo!' alternative
- Soft "Hey you!"
- Subtle "yo!"
- ''I've got a secret!''
- Intrusion acknowledgment
- ''Over here!'' whisper
- Whispered summons
- Kin of 'ahem'
- Sound before passing a note in class
- ''Hey, you!'' sound
- Sound from a nook, perhaps
- Attention-getter, in a theater
- Sound that gets attention
- With 61-Down, Jimi Hendrix's first single ... or a hint to the starts of 20-, 28-, 45- and 50-Across