Related Clues:
- Amount from which to figure sale profit
- It may go down on one knee
- Knee protection
- Pair (of birds)
- Underlying principle
- Argument's foundation
- Creative inspiration
- Prepare (oneself) for a jolt
- Fundamental principle
- Medical joint support
- "__ yourself!": "Get ready for a shock!"
- Foundation for something
- Part of a capital-gain calculation
- Presupposition
- Pain-in-the-neck wear?