Related Clues:

• This might give you a flat
• Book end?
• Lend-___ Act
• Permits
• Buy alternative
• Reason for a do-over?
• Replayed tennis shot
• Paper for a pad
• Co-op contract
• Umpire's call
• Tennis call
• Reveal, with 'out'
• Allowed
• Permit
• Voided tennis shot