Related Clues:

• 'Cool it!'
• Flag down
• Grind to a halt
• Telegram "period"
• Tops a different way?
• Octagonal traffic sign
• Call a halt to
• "Freeze!"
• 'Uncle!'
• Octagon inscription
• Octagonal sign
• Cry from a tickled person
• Word on the street
• Highway sign
• Telegram punctuation