Related Clues:

• 'Uh-huh'
• Words after 'whether'
• 'Yeah, right!'
• Cynic's retort
• 'Oh, right!'
• See 5-Across
• 'Don't think so'
• 'Yeah, sure!'
• 'Yeah, right'
• 'Oh, sure!'
• 'Oh, sure'
• Choice words
• 'Yeah, sure'
• Sarcastic response
• See 38-Across