Related Clues:
- Signal, as for an 18 Across
- Watchful and ready
- Primed for action
- Watchful, sharp
- Watchful and bright
- Vigilant, watchful
- Watchful, quick-thinking
- Give notice to
- Greet, call or salute
- Awake and watchful
- Signal to and summon, say a taxi
- Greet or applaud
- Precipitation of ice pellets
- Watchful and attentive
- Wide-awake and watchful