Enlighten; teach
I believe the answer is:
edify
I believe this clue is a double definition.
'enlighten' is the first definition.
(I know that enlighten can be written as edify)
'teach' is the second definition.
(I know that edify is a type of teach)
(Other definitions for edify that I've seen before include "Tutor" , "Build up spiritually" , "Improve the minds of" , "Instruct - uplift" , "Uplift; elevate" .)