Cover up what many like to observe (6)
I believe the answer is:
screen
'cover up' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for screen that I've seen before include "Films are projected onto it" , "Protective frame" , "Censer (anag.)" , "Shield - broadcast" , "Examine for suitability, sift" .)