Related Clues:

• Sphere, as of interest
• See 56-Across
• Rock-tour venue
• Length x width, for a rectangle
• Place to play
• Political sphere
• Restricted ___
• O
• The 'A' of 38-Across
• See 65-Across
• Circus Maximus, e.g.
• It may be provided concessions
• Madison Square Garden, for one
• Hippodrome, e.g.
• Sphere of specialty