Priest who sounds like a beast (4)

I believe the answer is:

lama

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'priest' is the definition.
(I know that lama is a type of priest)

I can't explain the remainder of the clue.

(Other definitions for lama that I've seen before include "Religious leader" , "A Buddhist priest in Tibet (4)" , "A Tibetan Buddhist priest or monk" , "Tibetan high priest" , "Dalai . . . ., chief priest and once ruler of Tibet" .)

I've seen this clue in The Guardian.

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