It gives backing for actors (7)

I believe the answer is:

scenery

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'it gives backing for actors' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

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(Other definitions for scenery that I've seen before include "(Constituents of) landscape" , "episode" , "Landscape, view" , "Picturesque countryside" , "Theatrical background" .)

I've seen this clue in The Globe and Mail.

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