Postmortem examination (7)
I believe the answer is:
autopsy
'postmortem examination' is the definition.
(synonyms)
This is all the clue.
(Other definitions for autopsy that I've seen before include "Examination to determine cause of death" , "Dissection of a body to determine the cause of death" , "Far from quick examination" , "Pays out (anag.)" , "Post-mortem inspection" .)