Stiff examination? (7)
I believe the answer is:
autopsy
'stiff examination?' is the definition.
(examination of a body or 'stiff')
This is the entire clue.
(Other definitions for autopsy that I've seen before include "An official post-mortem examination" , "final examination" , "A post-mortem examination of corpse" , "Pays out (anag.)" , "Examination after death, a post-mortem" .)