Related Clues:

• Sudden increase
• 20-20, say
• Big Board jump
• Haberdashery buy
• 50-50, say
• What 21-Across 51-Down is
• Have no loose ends?
• Get even?
• Share first, e.g.
• June gift, perhaps
• No-win situation?
• Even score
• Ascot, e.g.
• Even the score
• Requirement for a 10th inning