Instruct morally (5)
I believe the answer is:
'instruct morally' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for edify that I've seen before include "Instruct - uplift" , "Educate, uplift" , "Tutor" , "Improve (someone) morally or intellectually" , "Improve understanding" .)