Abandon some surgery led by doctor (4)
I believe the answer is:
drop
'abandon' is the definition.
(I've seen this before)
'surgery led by doctor' is the wordplay.
'surgery' becomes 'op' (short for operation).
'led by' is a charade indicator (letters next to each other) (some letters go in front of others).
'doctor' becomes 'dr' (abbreviation).
'op' after 'dr' is 'DROP'.
'some' is the link.
(Other definitions for drop that I've seen before include "Small amount of liquid" , "Discontinue -- delivery" , "Go to ground" , "small amount of alcohol" , "Collapse, globule" .)