Doctor cites me for providing such sickening medicines (7)
I believe the answer is:
emetics
'such sickening medicines' is the definition.
'emetics' can be an answer for 'medicines' (emetic is a kind of medicine). I'm unsure of the 'such sickening' bit.
'doctor cites me' is the wordplay.
'doctor' is an anagram indicator.
'cites'+'me'='citesme'
'citesme' is an anagram of 'EMETICS'.
'for providing' is the link.
Can you help me to learn more?
(Other definitions for emetics that I've seen before include "We bring up" , "they make me vomit!" .)