Either way, it's in a stern position (4)

I believe the answer is:

poop

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'either way' is the definition.

I cannot understand how the remainder of the clue works.

(Other definitions for poop that I've seen before include "Palindromic part of a ship" , "Highest aftmost deck" , "Raised stern of a sailing ship" , "High deck at old sailing ship's stern" , "Whichever way you see them, the facts" .)

I've seen this clue in the Evening Standard.

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