Related Clues:

• Invoke misfortune
• Form letters?
• Persistent bad luck
• Imprecation
• Use four-letter words
• Oath
• Magic effect
• Magic words
• Relieve temporarily
• One that's ill-prepared?
• Turn the air blue
• 'May you live in interesting times,' e.g.
• Evil spell
• Witch's curse
• Say '@#$%!'