Provoke enlightenment, we hear, shifting stress (6)
I believe the answer is:
incite
'provoke' is the definition.
(inciting is a kind of provoking)
I can't explain the rest of the clue.
(Other definitions for incite that I've seen before include "Encourage, urge" , "Stir up (trouble)" , "Prompt" , "Stir up (eg, violence)" , "Trigger" .)