Doctor abandoning booze for writing (3)
I believe the answer is:
ink
'doctor' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ink that I've seen before include "Printer's medium" , "Liquid used to write" , "Liquid used in printing" , "Dark liquid" , "form of writing" .)