Possible Clues:

• Puts the tennis ball in play
• Tennis match starters
• Starts a tennis point
• Waits on court openings, perhaps
• Strokes that puts the ball in play
• "__ you right!"
• Starts of tennis rallies
• "It ___ Me Right to Suffer" John Lee Hooker
• Ministers to observe solar eclipse
• Starts the game depicted in this puzzle