Crossword Genius

Ship's backbone (4)

Ross

I believe the answer is:

keel

'ship's backbone' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for keel that I've seen before include "Long part on a boat's bottom" , "Support on which ship is built" , "Longitudinal structure supporting the frame of a vessel" , "Long timber" , "Structural member of a ship" .)

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