Crossword Genius

Inundate in the bathroom? (6)

Ross

I believe the answer is:

shower

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'inundate' is the definition.
(thesaurus)

I can't explain the remainder of the clue.

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(Other definitions for shower that I've seen before include "A brief fall of rain or a cleansing spray" , "Washing facility - worthless lot" , "Incompetent group" , "Lavish" , "Brief spell of precipitation" .)

I've seen this clue in The Mirror.
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