Related Clues:
- 30-Across, for one
- Mentally active
- Warning signal after alcoholic drink? Right
- Quick signal
- Beer crate regularly dropped on your toes
- Backs in Barcelona football game never sit on the ball
- Warn; attentive
- Warning of change with time moving on
- Signal warning of danger
- On the ball; warning
- Like a guard on duty
- Phone beep, sometimes