Related Clues:
- Definitely on one's toes
- Not likely to miss much
- Ding or buzz, maybe
- Make changes, putting down time on watch
- In a high state of readiness
- Quiet Riot "Red ___"
- Ready for shows
- Make buddy aware of show
- Show heads-up
- Tour heads-up
- What fans are on for upcoming shows
- Smartphone notification
- Phone setting
- Like the best security guards
- Cautious and conscious