Dirty water that collects at the bottom of a ship's hull (5)

I believe the answer is:

bilge

(Other definitions for bilge that I've seen before include "Hogwash" , "bull" , "Dirty water in bottom of boat - drivel - nonsense" , "(Water at) bottom of ship" , "Rubbish, nonsense; dirty water in ship" .)

I've seen this clue in The Times.

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