Related Clues:

• Field of play
• Surroundings
• Football locale (and a letter bank for 47-Across)
• Geometrician's calculation
• Heavenly body
• Place for a game
• It has a code
• Realm
• Gladiator's venue
• Kind of code used every day
• Our home
• Nonsmoking ___
• Geometric measure
• Superiority complex?
• Symbol of royalty