Theater backdrop (5)

I think it could be either:

Which length description are you looking for?:

scrim

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

This is all the clue.

(Other definitions for scrim that I've seen before include "Open-weave muslin fabric" , "material" , "A loosely-woven cotton fabric" .)

I've seen this clue in the LA Times and The New York Times.

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