Related Clues:

• 20-20, say
• Racetrack boundary
• Haberdashery buy
• 50-50, say
• What 21-Across 51-Down is
• Have no loose ends?
• Get even?
• Fence part
• Share first, e.g.
• Staircase part
• June gift, perhaps
• Plane alternative
• Snooker cushion
• No-win situation?
• Even score