Medication artist brought back for supporter (6)
I believe the answer is:
pillar
'supporter' is the definition.
(pillar is a kind of supporter)
'medication artist brought back' is the wordplay.
'medication' becomes 'pill' (pill is a kind of medication).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'brought back' shows that the letters should be reversed in order.
'ra' reversed gives 'ar'.
'pill'+'ar'='PILLAR'
'for' is the link.
(Other definitions for pillar that I've seen before include "Supporter" , "Column; admired member (of community)" , "Column, support" , "Upright column" , "Support structure" .)