lucidness(n = noun.attribute) clarity, clearness, limpidity, lucidity, pellucidity - free from obscurity and easy to understand; the comprehensibility of clear expression;
is a kind of comprehensibility, understandability
has particulars: monosemy, focus, clearcutness, preciseness, perspicuity, perspicuousness, plainness, unambiguity, unequivocalness, explicitness

   The quality of being lucid; lucidity. [1913 Webster]

N  perspicuity, perspicuousness, plain speaking, definiteness, definition, exactness, explicitness, lucidness, lucid, explicit, exact.