What does the cryptic crossword clue "Doctor pays out for post mortem (7)" mean?

The definition is "post mortem". The wordplay uses an anagram. anagram of PAYS + OUT = AUTOPSY; definition: "post mortem" The answer is AUTOPSY.

Doctor pays out for post mortem (7)

Daily Mail Cryptic #16390 | 10 Across | 2020-08-27 flower