Hide porn when getting treatment with new brain chemical (9)
I believe the answer is:
endorphin
'hide' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Maybe you can see a link between them that I don't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for endorphin that I've seen before include "Opiate-like substance produced in the brain" , "Hormone in the brain with an analgesic effect" , "Neurochemical with analgesic properties - dinner hop (anag)" , "painkiller" .)