On his own, the doctor goes north - wise fellow! (7)
I believe the answer is:
solomon
'north wise fellow' is the definition.
The definition suggests a singular noun which matches the answer. I also know that 'wise' relates to this answer.
'on his own the doctor' is the wordplay.
'on his' becomes 'solon' (I can't justify this - if you can you should give a lot more credence to this answer).
'own' is an insertion indicator.
'the doctor' becomes 'mo' (medical officer).
'solon' going around 'mo' is 'SOLOMON'.
'goes' acts as a link.
Can you help me to learn more?
(Other definitions for solomon that I've seen before include "Son of King David" , "Biblical wise king" , "Short-lived" , "Old king of Israel famous for wisdom and magnificence" , "Very wise ruler" .)