Profession of a physician (8)
I believe the answer is:
medicine
'profession of a physician' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for medicine that I've seen before include "Study of diseases and cures" , "It treats or prevents the symptoms of disease" , "The practice of diagnosis and treatment of disease" , "Laughter is said to be the best one" , "doctor" .)