Starry artists tell a reviewer's hiding (7)
I believe the answer is:
stellar
'starry' is the definition.
(relating to stars)
'artists tell a reviewer's hiding' is the wordplay.
'hiding' indicates a hidden word.
'STELLAR' is hidden in the letters of 'artists tell a reviewers'.
(Other definitions for stellar that I've seen before include "characteristic of The Sun, etc" , "Outstanding -- star-like" , "boss!" , "of celebrities" , "Relating to the stars" .)