Related Clues:

• Folksy denial
• "Not for me"
• Dubious comment
• 'I'm good'
• "Ain't for me"
• Dismissive reply
• 'Nope, not interested'
• Backwoods 'uh-uh'
• 'Not likely!'
• "You're dreaming"
• 'Yeah, as if!'
• "Yeah, as if!"
• "I'd rather not"
• Slangy denial, and a hint to 20-, 29-, 46- and 56-Across
• ''Oh, sure''