Crossword Genius

Become red in the face or hand (5)


I believe the answer is:


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'become red' is the definition.

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for flush that I've seen before include "Poker hand of same suit" , "winning hand at poker" , "Look ashamed < , maybe even promising hand" , "Pull the chain - rush of emotion - good poker hand - having plenty of money" , "with a load of cash" .)

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