Wash one hand? (5)

I believe the answer is:

flush

I believe this clue is a double definition.

'wash' is the first definition.
(I know that flush is a type of rinse)

'one hand?' is the second definition.
(poker)

(Other definitions for flush that I've seen before include "colour" , "Become red and hot" , "Look ashamed < , maybe even promising hand" , "Rush of blood" , "Redden; level" .)

I've seen this clue in the Evening Standard.

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