Crossword Genius

Hand two little boys cleanse (5,5)

Ross

I believe the answer is:

royal flush

'hand' is the definition.
(I know that royal flush is a type of poker hand)

I don't understand the remainder of the clue.

(Other definitions for royal flush that I've seen before include "pulling of chain having vacated throne?" , "Sign of top family's embarrassment" , "Result of embarrassed Queen" , "evidence that monarch occupied throne?" , "Excellent hand" .)

I've seen this clue in The Telegraph.
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