Related Clues:

• Zero, e.g.
• Racing circuit
• Like one White House office
• Not quite a circle
• Small dog's spot
• Lionel train layout, maybe
• Luxury locale?
• Cartouche's shape
• Child support?
• Place for some computers
• Place for a dummy
• See 29-Across
• Baby seat, say
• Elliptical shape
• Oviform