Related Clues:
- Wide awake to a siren call
- State of (sudden) fear
- Chili hotness unit?
- Danger signal, e.g
- Early buzz?
- Keenly attentive
- There's usually no cause for this
- Sharp tip off
- Cellphone feature
- All-points bulletin, e.g
- Like prairie dogs, notably
- Offer a heads-up
- Keeping one's eyes peeled at crumbling alter
- Watch chain not originally belonging on watch?
- It might hold up a holdup