perspicuity

noun3

1. •
   Clarity, lucidity, especially in expression; the state or characteristic of being perspicuous.

   • […]whether through the first officer's want of perspicuity or my own stupidity, I was not a bit the wiser for the explanation. — 1880
2. •
   (rare) Transparency; translucence.

   • It must have been on some such day of harsh sunlight, the incisive February brightness that gives perspicuity without warmth. — 1900
3. •
   Perspicacity; insight.

   • Thompson, a high school dropout, said with rare perspicuity that he doubted the FBI would hire him. — 1965