Possible Clues:

• Maybe brother Rex is on ecstasy
• Grandchild, perhaps, bringing monarch great joy
• Oriental upset with 9 across
• Connection to one of those in both halves of 1 across
• Pound note put back in share account
• The Castilian comes into part of the story
• Granddaughter, perhaps, beginning to read? Joy
• Member of family telling a story?
• Is there a connection here to both halves of 1 across?
• King getting happiness in telling of story