Deck game held up with king on board (5)

I believe the answer is:

orlop

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'deck' is the definition.
(a deck on a ship)

I don't understand the remainder of the clue.

(Other definitions for orlop that I've seen before include "deck at the lowest point" , "part of ship" , "hold covering" , "Lowest deck of a wooden sailing ship" , "Ship's lowest deck" .)

I've seen this clue in The Independent.

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