Biblical prophet thrown into the lion's den (6)
I believe the answer is:
daniel
'biblical prophet thrown into the lion's den' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for daniel that I've seen before include "Hebrew prophet rescued from lion's den" , "-- Barenboim, -- Boone" , "-- Defoe; -- Barenboim" , "-- Deronda (Eliot)" , "Biblical prophet who survived the lion's den" .)