Related Clues:

• End of a blackmail threat
• 'Otherwise, I might do something you'll regret!'
• "Otherwise, I might do something you'll regret!"
• Perhaps even one way of printing stupidly
• Ominous last words
• Ominous end of a threat
• Ominous final words
• Backup introducer
• End to a bully's threat
• Vague threat from uncapped mushrooms on middle of steak
• Threatening phrase cryptically found in Elsinore
• Warning head will be sacked from central London school
• Because otherwise
• 'Speak fair words, — — be mute' (Shakespeare, Venus and Adonis)
• Uncreative threat