Related Clues:
- Like good sentries
- Text ___
- Might come as a text about a secret show location
- After drink, retweet hollow warning
- Frost advisory, e.g
- With ears pricked up
- Cellphone notice
- Shout "Duck!" to, say
- Ready for an attack, say
- Yell "Heads up!" to
- Skill to tie up the French on the ball
- Not missing a trick
- Well-caffeinated, perhaps
- 'Incoming!,' e.g
- Having ears cocked