Fresh carcass not inviolable (10)
I believe the answer is:
sacrosanct
'inviolable' is the definition.
(I've seen this before)
'fresh carcass not' is the wordplay.
'fresh' is an anagram indicator.
'carcass'+'not'='carcassnot'
'carcassnot' with letters rearranged gives 'SACROSANCT'.
(Other definitions for sacrosanct that I've seen before include "Too valuable to touch" , "above criticism" , "protected" , "Too important to touch" , "Unchallengeable" .)