From a ship into the water (9)
I believe the answer is:
overboard
'from a ship into the water' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for overboard that I've seen before include "in need of a life jacket" , "(Fall) into the sea" , "Man . . . . . . . . . - launch the lifeboat!" , "Off boat into water" , "excess" .)