Turned to bone (8)
I believe the answer is:
ossified
'turned to bone' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ossified that I've seen before include "Turned to bone with age" , "Fossilised, petrified" , "Made rigid and set into a conventional pattern" , "If so, dies being turned into bone" , "Made hard like bone - or commonly drunk" .)