Possible Clues:

• Learn structure of kidneys
• Genuine about name of an organ
• Learn anew about some internal organs
• Passageway going up to right of kidneys
• Path right back from an organ
• Name set in concrete of waste processor
• About the kidney
• Concerned with organ being removed from children altogether
• Vital organ's actual name is concealed
• Little bird spends week on a pound of kidneys