Ridicule medicine or remedy finally (7)
I believe the answer is:
pillory
'ridicule' is the definition.
(thesaurus)
'medicine or remedy finally' is the wordplay.
'medicine' becomes 'pill' (pill is a kind of medicine).
'finally' indicates one should take the final letters.
The final letter of 'remedy' is 'y'.
'pill'+'or'+'y'='PILLORY'
(Other definitions for pillory that I've seen before include "Expose to public ridicule" , "Publicly ridicule" , "Expose to public derision" , "place of punishment" , "Assail; old punishment frame" .)