One next to Carol, not caught messing about in school photo (8)

I believe the answer is:

polaroid

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'photo' is the definition.
(photograph taken with a Polaroid camera)

I cannot understand how the remainder of the clue works.

(Other definitions for polaroid that I've seen before include "still available immediately" , "Plastic material used in sunglasses" , "film" .)

I've seen this clue in The Guardian.

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