Remove organ from dead sailor first (6)
I believe the answer is:
ablate
'remove organ' is the definition.
(I've seen this before)
'dead sailor first' is the wordplay.
'dead' becomes 'late' (similar in meaning).
'sailor' becomes 'ab' (abbreviation for able seaman).
'first' is a charade indicator (letters next to each other).
'late' after 'ab' is 'ABLATE'.
'from' acts as a link.
(Other definitions for ablate that I've seen before include "Remove an organ or bodily structure by surgery" , "Surgically remove organs" , "Surgically remove an organ" , "Aircraft able to land on ice" , "do surgical removal" .)