Do patients keep coming in streams to him? (7)
I believe the answer is:
surgeon
'do patients keep coming in streams to him?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is all the clue.
Can you help me to learn more?
(Other definitions for surgeon that I've seen before include "Doctor in the navy" , "Naval doctor" , "9 practitioner (through keyhole?)" , "one used to working in the theatre" , "Medical practitioner - go nurse (anag)" .)