Possible Clues:

• Likely successor to the throne
• A lot about one King and father, perhaps – to me?
• I criticise father, perhaps, supporting male successor eventually
• Parthian peer replaced as one expected to succeed
• Next in line to throne
• One to succeed in declaring the invisible visible
• One expected to succeed
• Pot broken by Irish relative, expected replacement
• Next in line to a throne
• Prepare a hint, cryptically, for person sure to succeed