Tell the doctor to keep swelling? (7)
I believe the answer is:
surgeon
'swelling?' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for surgeon that I've seen before include "Hospital worker" , "9 practitioner (through keyhole?)" , "Medical man" , "one used to working in the theatre" , "Man with knife" .)