He may treat you patiently (6)
I believe the answer is:
medico
'he may treat you patiently' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he' is the wordplay.
I cannot really see how this works, but
'he' could be 'ed' (short for Edward) and 'ed' is located in the answer.
The remaining letters 'mico' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for medico that I've seen before include "Health practitioner" , "quack" , "Doctor" .)