Bathroom fixture picked up two days before D-Day? (5)

I believe the answer is:

bidet

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'bathroom fixture' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

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(Other definitions for bidet that I've seen before include "Bathroom fitment" , "Cleaning vessel for privates" , "bathroom cleaner" , "Type of basin" , "Bathroom fixture" .)

I've seen this clue in The Times.

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