You might get this straight from throne in Buckingham Palace? (5,5)
I believe the answer is:
royal flush
'you might get this straight' is the definition.
(royal flush is a type of straight flush in poker)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for royal flush that I've seen before include "embarrassment at the palace?" , "Sign of top family's embarrassment" , "Top hand" , "Hand of cards" , "Great hand" .)