Related Clues:

• Racing circuit
• Like one White House office
• Not quite a circle
• Lionel train layout, maybe
• Cartouche's shape
• Elliptical shape
• Oviform
• Elliptical track
• Picture frame shape
• NASCAR track
• Like some earrings
• Like 'O'
• Amphitheater shape
• Like an egg
• Office of the president