Related Clues:

• Eagle-eyed
• Standing at the ready
• Sign word that may be followed by an exclamation point
• Shout "heads up!"
• Cell user's need
• Prepare to turn
• Paying heed
• "Heads up!" e.g.
• All eyes and ears
• It's high when it's red
• Attentive to possible danger
• Wink, e.g.
• Bright eyed and bushy tailed
• Use a blinker
• Bit of Weather Channel news