Hide what is needed for successful projecting (6)

I believe the answer is:

screen

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'hide' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

(Other definitions for screen that I've seen before include "Room divider" , "Censer (anag.)" , "Surface on which pictures are projected in cinemas" , "Blind - hide from view" , "Room partition; vet" .)

I've seen this clue in The Irish News.

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