Entertainer rates it poorly (7)
I believe the answer is:
artiste
'entertainer' is the definition.
(artiste is a kind of entertainer)
'rates it poorly' is the wordplay.
'poorly' indicates anagramming the letters.
'rates'+'it'='ratesit'
'ratesit' is an anagram of 'ARTISTE'.
(Other definitions for artiste that I've seen before include "nightclub entertainer?" , "Theatre performer" , "One entertaining" , "A sitter for creative person" , "'Public performer, dancer or singer (7)'" .)