Related Clues:

• Homonym for 36-Down
• Utility company's measurement
• Take habitually
• Play for a sucker
• "--- sparingly"
• Play with
• Walk all over, e.g.
• "Mileage"
• English-class topic
• "What's the __?"
• Not leave on the shelf
• Semanticist's concern
• ''Oh, what's the ___?''
• Established practice
• Lexicographer's study