Institution seen as above criticism, but lower in religion? (6,3)
I believe the answer is:
sacred cow
I believe this is a double definition.
'institution seen as above criticism' is the first definition.
(I've seen this before)
'lower in religion?' is the second definition.
(I've seen this before)
'but' is the link.
(Other definitions for sacred cow that I've seen before include "Institution not to be criticised" , "Hallowed bovine in India or revered institution" , "Person or institution held to be above criticism" , "lower in religion" , "Object beyond criticism" .)