Wordnet polsko-angielski 
                         (an interpretation that removes obstacles to understanding
"the professor's clarification helped her to understand the textbook") 
clarification, elucidation, illumination 
synonim: przejaśnienie
Wielki słownik medyczny polsko-angielski 2011 r., Anna Słomczewska
                        clearing up, clarification, lucidification
Otwarty słownik polsko-angielski V.9.2007, Copyright (c) Jerzy Kazojć - 2007 r.
                        highlighting
illumination