Ship's surgeon? (6)
I believe the answer is:
cutter
This clue is a double definition.
'ship's' is the first definition.
(thesaurus)
'surgeon?' is the second definition.
(surgeons cut during surgery)
(Other definitions for cutter that I've seen before include "Slicing tool of fast sailing ship" , "A scissors, say, or a small ship" , "Small vessel" , "One working with Ruby possibly" , "Boat; tailor" .)