Related Clues:

• Threatening end
• Goon's parting shot
• Shiner accompanier, maybe
• Bully's conclusion
• Intimidation conclusion
• Threat bit
• "If that doesn't work ..."
• Bully's last words
• Threatening term
• Words often accompanied by a 45-Across
• ''... if you want to avoid trouble''
• Ominous words
• A right may cause one
• Threatening ending
• Bully's warning