Related Clues:

• Certainly not close to autumn, the night before last in summer
• Word on a big red stamp that I imagine the president owns
• 'I forbid,' to Caesar
• Nix from the president, e.g
• When pigs fly in one vertically
• Definitive denial
• Examine old reject
• Forbid to go back inside remote valley
• Disallow cipher, following check
• Refusal to assent
• Succinct version of the combined final words of the starred answers
• Don't allow surgeon to take lead in operation
• Adamant refusal
• Specialist doctor gets round ban
• "___ Mind the Bollocks, Here's the Sex Pistols"