Related Clues:

• Cashless deal
• Baseball news
• It's a living
• Transaction
• Carpentry or plumbing, e.g.
• It may be an even one
• Indulge in quid pro quo
• Line of work
• Occupation
• Type of meet
• Profession
• Word with horse or free
• Buy and sell
• Vocation
• With 38-Across, what the four key parts of this puzzle are