Related Clues:

• Warning signals
• Burglar deterrents
• Disturbs
• Warning devices
• Causes concern
• Security devices
• Fire and burglar, e.g.
• Startles
• Causes of some rude awakenings
• Some bells and whistles
• Unsettles
• Loud get-ups?
• Dismays
• Waker-uppers
• Bells and whistles, say