Quote yours truly about medicine making you sick (6)
I believe the answer is:
emetic
'medicine making you sick' is the definition.
I know that 'sick' relates to this answer.
'quote yours truly about' is the wordplay.
'quote' becomes 'cite' (synonyms).
'yours truly' becomes 'me' (the person who set this crossword).
'about' says the letters should be written backwards.
'cite'+'me'='citeme'
'citeme' in reverse letter order is 'EMETIC'.
Can you help me to learn more?
(Other definitions for emetic that I've seen before include "it will make one sick" , "Medicine that induces nausea and vomiting" , "Medicine taken to make one vomit" , "Ipecacuanha is one" , "Medicine causing vomiting" .)