Crossword Genius

King's embarrassment at finding five in a suit? (5,5)

Ross

I believe the answer is:

royal flush

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'king's' is the definition.
(thesaurus)

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

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(Other definitions for royal flush that I've seen before include "Great hand" , "Top hand" , "winning hand?" , "Result of embarrassed Queen" , "embarrassment at the palace?" .)

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