Buddhist monk (4)
I believe the answer is:
lama
'buddhist monk' is the definition.
(as in the Dalai Lama)
This is all the clue.
(Other definitions for lama that I've seen before include "A Tibetan Buddhist priest or monk" , "devout Buddhist" , "A Buddist monk in Tibet" , "Tibetan spiritual leader" , "Religious leader" .)