Steroid-producing gland (7)
I believe the answer is:
adrenal
'steroid-producing gland' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for adrenal that I've seen before include "Relating to certain glands" , "(Gland) on the kidney" , "Gland that secretes the fight or flight hormone" , "Gland near the kidneys" , "Relating to glands near the kidneys" .)