Related Clues:

• Security concerns
• Gives a heads-up to
• Sounds the alarm
• ''Heads up!'' and others
• Acts the stoolie
• Divulges
• "Fore!" and "Duck!"
• Unintentional poker table signals
• Blows the whistle (on)
• Bells and whistles, maybe
• Recounts
• Narrates, as a story
• Rats, so to speak
• Puts on notice
• Doesn't hold back