A couple of ways around organ (7)
I believe the answer is:
adrenal
'organ' is the definition.
(adrenal is a kind of organ)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for adrenal that I've seen before include "close to the kidneys!" , "Gland that secretes the fight or flight hormone" , "(Gland) on the kidney" , "Gland near the kidneys" , "Relating to glands near the kidneys" .)