Possible Clues:

• Very large
• Bed type
• Huge
• Very large like Henry VIII's bed?
• Royalty sounds weary of this, to a large extent
• If a cat may look at a king, this, to a large extent, he is what he may use in return, soundly
• Gigantic, or a type of bed
• Very large, as a bed (hyph.)
• Extremely large fit for monarch
• Bed choice