Related Clues:

• Olympics no-no
• No-no at a horse race
• Illegal steroid use, e.g
• Armstrong's admission
• Calculating, with ''out''
• Taking 8
• Fix the animal on guard, giving it a Mickey Finn
• Knocking out piano in performance
• Cyclist's violation
• Pro athlete's no-no
• Athlete's no-no
• Olympian's violation