Related Clues:

• Security measures
• "Emergency!" warnings
• Claxons
• They may be behind pictures
• Makes secure
• Bank vaults
• They may have bells and whistles
• Keepers of jewels
• More than shuts
• Crackers' targets
• Firehouse ringers
• Warnings of danger
• Devices that signal danger
• Fills with apprehension
• Clusters of hair