Having achy pins, I get treatment from a doctor (9)
I believe the answer is:
physician
'a doctor' is the definition.
('physician' can be a synonym of 'doctor')
'having achy pins i get treatment' is the wordplay.
'achy pins i' can be anagrammed to 'PHYSICIAN'.
Though, I'm not sure how the anagram is indicated.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for physician that I've seen before include "A doctor, as in ''........, heal thyself''" , "Medic" , "Licensed medical practitioner" .)