Related Clues:

• Otherwise - may be threatening
• If not, then - sounds like a threat
• Do it . . . . . . - an informal warning
• If not, then - vaguely threatening
• End to a threat, perhaps
• "If you want to avoid trouble"
• 'What's it gonna be?'
• The end of a threat to get zero new reels
• Threat punctuator
• ". . . unless you want trouble"
• Open-ended ultimatum
• Words that warn you
• Bully's last words, maybe
• Little number put on by the Queen just after quarter to five, before it's too late?
• Giving an alternative sort of threat