"Must-see" review (4)
I believe the answer is:
rave
'must-see review' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rave that I've seen before include "Rapturous" , "Enthusiastically favourable review" , "Rant - noisy, all-night party" , "Fume" , "Illegal party; talk madly" .)