Related Clues:

• 'Impossible!'
• Informal refusal
• "Sorry"
• Isn't 25-Across
• Terse denial
• "Can't say as I do"
• "In your dreams"
• 'Sorry...'
• ''The Little Red Hen'' denial
• Singsong speech
• 'Unh-uh'
• First words of ''Satisfaction''
• Casual refusal
• Unable to
• "You __ be serious!"