Related Clues:

• More than a dabbler
• With 45-Across, for the time being
• Expert, in slang
• Of primary importance
• College choice
• Military bigwig
• A backer of
• Tennis club teacher
• Moneymaker
• Uppermost
• The Masters or British Open, e.g.
• Student's choice
• One side in a debate
• Tyro's mentor, perhaps
• All for