Person above criticism (6,3)
I believe the answer is:
sacred cow
'person above criticism' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sacred cow that I've seen before include "Person, custom, etc unreasonably held to be beyond criticism" , "counterpart of papal bull?" , "One unreasonably held to be above criticism" , "Institution not to be criticised" , "Something bovine above criticism?" .)