Whom Mandela said "exhorted morality" (6)

I believe the answer is:

gandhi

(Other definitions for gandhi that I've seen before include "Mahatma ....., great Indian leader" , "Indian man of peace" , "Leader of Indian independence movement" , "Pacifist leader during India's struggle for independence" , "Spiritualistic Indian statesman" .)

I've seen this clue in the Newsday.

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