Related Clues:

• Eggs, to Cato
• Brutus's breakfast choice?
• Eggs in biology class
• "Avis" eggs
• Lots of 13-Across
• Eggs in science class
• Egg, to Brutus
• Biological versions of 10-Down
• Eggs in biology
• Eggs with mammals in them
• Eggs for an old Roman senator
• Some egg cells
• Eggs in a laboratory
• Avis products
• What avis make