"elucidation" in the noun sense
1. elucidation
an act of explaining that serves to clear up and cast light on
2. clarification, elucidation, illumination
an interpretation that removes obstacles to understanding
"the professor's clarification helped her to understand the textbook"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License