Related Clues:
- Amount from which to figure sale profit
- Underlying principle
- Argument's foundation
- Creative inspiration
- One of the ABCs
- Fundamental principle
- Foundation for something
- Part of a capital-gain calculation
- Presupposition
- Foundation, as of an argument
- Underlying idea
- Main ingredient
- Foundation or main principle
- Foundation or support, or a main principle
- Foundation of a theory or process