Entertainer sozzled is treat (7)
I believe the answer is:
artiste
'entertainer' is the definition.
(artiste is a kind of entertainer)
'sozzled is treat' is the wordplay.
'sozzled' indicates an anagram.
'is'+'treat'='istreat'
'istreat' is an anagram of 'ARTISTE'.
(Other definitions for artiste that I've seen before include "Attires like entertainer" , "A sitter for creative person" , "A sitter for a performer" , "Tears it (anag.)" , "nightclub entertainer?" .)