Possible Clues:

• Kingly fellow with excellent hand
• Hand that's sort of blue gets to turn red
• It could include Red Queen
• A hand in pulling of chain having vacated throne?
• Poker hand
• Action taken by queen vacating throne that's on the cards
• A good hand is what's needed when Queen leaves the throne
• Great hand making monarch look embarrassed?
• Sign of top family's embarrassment, getting such a good hand
• Combination of 55- and 64-Across