Reportedly criticise show (5)
I believe the answer is:
revue
'show' is the definition.
(revue is a kind of show)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for revue that I've seen before include "Entertainment with sketches, songs etc" , "Kind of show with sketches and songs" , "Light stage work" , "Stage entertainment with sketches, songs and dance" , "Variety show with mixed entertainments" .)