Related Clues:

• 37 Down teacher
• Major leaguer
• Revered expert
• Tennis instructor
• All-knowing one
• Country-club coach
• More than a dabbler
• With 45-Across, for the time being
• Expert, in slang
• A backer of
• Tennis club teacher
• Moneymaker
• One side in a debate
• Tyro's mentor, perhaps
• Wise advisor