Advice doctor leaves wretched scoundrel (7)
I believe the answer is:
counsel
'advice' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for counsel that I've seen before include "Legal advice" , "Advise" , "Advice; barrister" , "Lawyer who pleads cases in court" , "Guidance" .)