Related Clues:

• Like many an amphitheater
• Not a perfect circle
• Lionel train path, often
• Like most orbital paths
• Racetrack path
• Common Lionel layout
• Like a zero
• Sort of round
• Track configuration
• Miler's loop
• Typical track
• Like acorns, usually
• Track path
• Eyeglass lens shape
• Tot's circle, perhaps