Crossword Genius

Foe failed to finish with a washout? (5)

Ross

I believe the answer is:

enema

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'washout?' is the definition.
(thesaurus)

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(Other definitions for enema that I've seen before include "treatment by rear entrance" , "Procedure for vacating the bowels" , "Suppository" , "medicine to get you going" , "Fluid injected rectally" .)

I've seen this clue in the Sydney Morning Herald.
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