Related Clues:

• 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
• Weather advisory
• What fans are on, for upcoming shows
• Beer and porter, at heart, will make one dozy? The opposite
• Wide awake and on one's toes