Related Clues:

• Innocent's claim
• "Not gonna happen"
• Polite turndown
• 'Fat chance'
• Terse turndown to an invitation
• "I don't think so"
• "Ixnay"
• Curt turndown
• 'Absolutely not!'
• Lacks the skills
• 'Don't think so!'
• Opposite of 15-Across
• "Don't think so"
• Polite denial
• 'Unh-unh'