Related Clues:

• Parental warning
• Fair and square
• ''Cross my heart!''
• Unambiguous words
• ''I'm telling the truth!''
• Word immediately preceding some signatures
• Incorruptible
• "No lie!"
• Beyond a doubt
• "Cross my heart!"
• 'For real!'
• 'No lie'
• ''It's true, really!''
• "It's the truth!"
• 'No, really!'