Related Clues:

• What you should do when you see red
• "Cool it!"
• Bring to an end
• Bring an end to
• Route interruption
• Telegram word
• ''Go no farther!''
• 'Let it be!'
• Give it a rest
• You may come to it
• Put the brakes on
• Tour part
• Red alert?
• "Don't take another step!"
• What 28-Across means