Nonviolence advocate (6)
I believe the answer is:
gandhi
'nonviolence advocate' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gandhi that I've seen before include "Indian nationalist and spiritual leader" , "who played leading role in getting England out" , "Spiritualistic Indian statesman" , "Leader who preached non-violence" , "Famous Indian politician" .)