Hindu spiritual teacher (4)
I believe the answer is:
guru
'hindu spiritual teacher' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for guru that I've seen before include "Name given to the each of the first ten leaders of the Sikh religion" , "Master, mentor" , "Revered mentor" , "Spiritual guide" , "Hindu or Sikh religious teacher or leader" .)