Nephrologist's specialty (6)
I believe the answer is:
kidney
(Other definitions for kidney that I've seen before include "Organ; kind; bean type" , "temperament" , "class" , "body part" , "Organ at back of abdomen" .)
I believe the answer is:
kidney
(Other definitions for kidney that I've seen before include "Organ; kind; bean type" , "temperament" , "class" , "body part" , "Organ at back of abdomen" .)