A projected entertainment (4)

I believe the answer is:

film

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'entertainment' is the definition.
(film is a type of entertainment)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for film that I've seen before include "reels, perhaps" , "Thin membrane" , "Flick" , "Cinema entertainment" , "Cinema celebrity" .)

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