Related Clues:
- Red flag, maybe
- Sound a warning
- A serious one might be red
- Fresh beer right on time
- Porter's right to be vigilant
- Fully caffeinated, say
- Watchful consort barring bachelor
- Lille's wingers with all-round skill on the ball
- 'Incoming!', e.g
- Twitchy, later awake
- Warning that's often red
- Wide awake for a siren call
- With an agile attitude
- Pop-up, sometimes
- Like a good guard dogs