Related Clues:

• 'You betcha!'
• 'Oh, sure!'
• 'Oh, sure'
• Blast
• 'I told you so!'
• Sound of disapproval
• Least bit of concern
• 'And pigs fly!'
• Greeting for the villain
• Knee-slapper
• What 69-Across will grow up to do
• 'Fat chance!'
• 'A likely story!'
• Halloween greeting
• It may give you a good start