Related Clues:

• Frighten
• Driver's alert
• Angry motorist's need
• It clears the way
• Auto option
• Morning waker-upper
• Apprehension
• Security concern
• It may do a number on your slumber
• Warning bell
• Site of plenty?
• Word with shoe or in
• Eye opener, of a sort
• Car alarm?
• Chili-hotness measure