Related Clues:
- Warning that's often red
- Wide awake for a siren call
- Greet — precipitation
- With an agile attitude
- Pop-up, sometimes
- Like a good guard dogs
- Signal from the curb
- Fit for sentry duty
- One may precede a spoiler
- Rain hard?
- Falling ice pellets
- Spoiler ___ (disclaimer before telling someone that Walt kills Jesse then himself in the last episode of 'Breaking Bad,' say)
- Google ___ (notification I get every time Justin Bieber does anything)
- Not asleep at the wheel
- It can be red or amber