Related Clues:

• Nautilus locale
• Type of football
• Workout site
• Where to get a 'six-pack'
• Padua's ___ Chapel, with a renowned Giotto fresco
• 'Gladiator' setting
• Fight card site, perhaps
• Fan setting
• Fight card site
• Play area?
• Gladiators' locale
• Place of contention
• Competition site
• Cleveland's Gund, for one
• Circus location