Related Clues:

• Traffic
• Lifework
• Sports deal
• Economic lifeblood
• Tit for tat
• See 67-Across
• Kind of secret
• Give and take
• The 't' in Nafta
• Carpentry or masonry, e.g.
• Exchange
• Swap players or baseball cards
• Be active on Wall St.
• Do business
• Give and take?