elucidation

noun

1. A making clear; the act of elucidating or that which elucidates, as an explanation, an exposition, an illustration

   “The essay might, undoubtedly, have been rendered much more complete by a collection of a greater number of facts in elucidation of the general argument.”

   “At a time like the present when Eastern æsthetics are attracting the attention of scholars in all quarters, and particularly when the great field of Buddhist art is coming more into focus, a view of a little-known aspect of this subject may perhaps be the humble means of assisting in the elucidation of some of the complex problems with which this study is surrounded.”