Related Clues:

• Dimwitted sorts
• Uses steroids, e.g
• ''Mad'' magazine's staff, by their own admission
• Discontinuing treatment: cunning letters sent out to people acting stupidly
• Earns an athletic ban, perhaps
• Relatives of 33-Down
• Administers a drug, perhaps to enhance athletic performance
• Stupid people do it after change of heart, interrupting lives
• Halfwits find bit of test oddly lacking
• 23 down is top secret to foolish people
• Uses performance-enhancing drugs
• Do — is it arranged for fools?
• Bygone Mauritius dwellers
• Fossils?
• Residents of Mauritius, once