Thrown overboard (10)
I believe the answer is:
jettisoned
'thrown overboard' is the definition.
('jettison' can be a synonym of 'throw overboard')
This is the entire clue.
(Other definitions for jettisoned that I've seen before include "Discarded" , "dumped" , "Thrown away" , "Thrown overboard" , "Ditched" .)