Related Clues:

• Oath or solemn promise
• Curse or solemn word
• A vow or a curse
• Promise, swear
• Profane, or solemn, expression
• Commitment to tell the truth
• A curse or solemn declaration
• Promise or oath
• A curse - or a pledge
• 'Profane, or solemn expression (4)'
• Swearword or solemn promise
• Binding promise
• You'd swear this would get one round to a broken hat
• You'd swear that this was a hot one
• You'd swear that this begins to be like 14 down