Related Clues:

• 'Failure -- an option'
• Part 5 of today's quote
• 'Not a chance!'
• "Ain't happening!"
• Playground response to 51-Across
• Ain't fixed?
• Isn't a shortage of that
• In short, taint?
• ''Guess again!''
• Ain't right the son gets mixed up in it
• Contrarian's retort
• "Sorry, Charlie"
• Polite refusal to a lady
• "Ain't gonna happen!"
• ''Failure __ an option''