Related Clues:

• 'Keep dreaming'
• Work in Northumberland? Emphatically not!
• 'Ain't happenin''
• ''Ain't gonna happen''
• Doctor meeting Irishman with amputated foot? That's hardly likely
• Casual refusal ... and, another way, a hint to this puzzle's four longest answers
• 'That ain't gonna work'
• "Nah, I don't think so"
• 'Nuh-uh!'
• 'That ain't right'
• 'Negatory'
• Recalled old record being played? Definitely not
• 'Can't say I've seen it'
• Lecturer bringing in about a million? You wish!
• "No" to a cowpoke