Italian bankers I left to become a doctor (5)
I believe the answer is:
medic
'a doctor' is the definition.
(doctor is a type of medic)
'italian bankers i left' is the wordplay.
I cannot quite see how this works, but
'italian' could be 'i' (abbreviation for Italian) and 'i' is found within the answer.
'i' could be 'me' and 'me' is present in the answer.
The remaining letters 'dc' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'to become' acts as a link.
Can you help me to learn more?
(Other definitions for medic that I've seen before include "Word for 'doctor'" , "Eg, doctor" , "What was Basutoland" , "He may offer treatment" , "Physician (informal)" .)