Show (a film) at a cinema (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
screen
(Other definitions for screen that I've seen before include "Means of concealment - the cinema" , "Examine methodically" , "It can serve both to conceal and to show something" , "Examine for suitability, sift" , "Shield - broadcast" .)