Related Clues:

• Tennis term
• Ball in the net, sometimes
• "___ freedom ring" (MLK quote)
• Replayed shot
• Give consent
• What a stamp may indicate
• Tennis replay
• Chartered
• Approval
• It requires an improved service?
• Express agreement
• Give the green-light
• Give the go-ahead
• Court call that only sounds permissive
• Say it's okay