Leverage, as I define it, is a way of getting a disproportionate advantage. If you had a place to stand and the right lever, you could move the world, thought Archimedes. Your leverage might be your ability to get up earlier in the morning than most people, your superiority in one particular aspect of research and writing, your superior time management or space management skills.
Simply being smarter or more knowledgeable than others is not leverage, in this sense. To be leverage, the advantage has to yield results that are in some sense out of proportion to this advantage.