Possible Clues:

• Nearly, nearly suffering disorder of internal organ
• Authentic first name included – it's to do with the kidneys
• Dealing with filtration mechanism that's right way round
• Material incorporates name associated with organ
• Children alter covering of an organ
• Perhaps learn about kidneys
• Regarding the kidneys
• Learn (anag) — of organs of the body
• Of concern to nephrologists
• Involving kidneys