Might it make a poker player affluent? (5)

I believe the answer is:

flush

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'affluent?' is the definition.
(synonyms)

I cannot understand how the remainder of the clue works.

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

I've seen this clue in the Evening Standard.

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