Official treatment for corns out East (6)
I believe the answer is:
censor
'official' is the definition.
(censor is a kind of official)
'treatment for corns out east' is the wordplay.
'treatment for' indicates anagramming the letters (I've seen this in other clues).
'out' is an insertion indicator.
'east' becomes 'e' ('E' can be a synonym of 'east').
'corns' is an anagram of 'cnsor'.
'cnsor' enclosing 'e' is 'CENSOR'.
(Other definitions for censor that I've seen before include "He bans books and films" , "use blue pencil" , "Person authorised to remove unacceptable passages" , "Roman magistrate" , "State official who vets books etc for crones" .)