Possible Clues:

• Organ vessel with detailed wrinkle
• Annual growth margins excluded insulin supplier
• Where the islets of Langerhans are located
• Organ with sort of pipes to entertain elite mostly
• Gland near stomach
• Part of body of saintly bishop Rome ultimately kept
• Persian cat hasn't got it behind the stomach
• Insulin-producing glandular organ
• Digestive gland
• Criticise about justification having removed working organ