Told to evaluate light entertainment (5)
I believe the answer is:
revue
'light entertainment' is the definition.
(I've seen this in another clue)
'told to evaluate' is the wordplay.
'told' shows a homophone (sound like).
'to evaluate' becomes 'review' (I've seen this in another clue).
'review' sounds like 'REVUE'.
(Other definitions for revue that I've seen before include "Evening of songs and sketches" , "Topical variety show" , "Topical-sketch show" , "Variety show with mixed entertainments" , "Song and dance entertainment" .)