Related Clues:

• Tennis instructor
• Country-club coach
• More than a dabbler
• With 45-Across, for the time being
• Expert, in slang
• Make a trade
• A backer of
• Tennis club teacher
• Moneymaker
• One side in a debate
• Tyro's mentor, perhaps
• Take this for that
• All for
• Stroke improver
• Con's opposite