Related Clues:

• Open-ended ultimatum
• Words that warn you
• Bully's last words, maybe
• See 2
• See 25
• See 11
• Otherwise take railroad to the Home Counties
• Girl loses one or other
• Giving an alternative sort of threat
• Threatening words?
• Eels (anag)
• Threat-ending word (with "or")
• Other than those
• Unless
• Or ..., otherwise