Related Clues:

• Car buyer's option
• Bank feature
• Sound a Klaxon
• Common cell phone feature
• Loud get-up?
• Reason to get up in the morning?
• Break-in indicator
• Surprise big-time
• Rousing ringer
• Security device
• Car antitheft device
• Clock signal
• Home security component
• Word with ''smoke'' or ''fire''
• Waker-upper