Dirty water inside a ship (5)

I believe the answer is:

bilge

(Other definitions for bilge that I've seen before include "Lower part of hull; nonsense" , "Dirty water collecting on a vessel" , "Hogwash" , "Filthy water that collects in the bottom of a boat" , "(Water at) bottom of ship" .)

I've seen this clue in The New York Times.

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