Films and some film stars may suffer from it (12)

I believe the answer is:

overexposure

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

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(Other definitions for overexposure that I've seen before include "Photo given too much light" , "Too much visibility" , "extra time in good light" .)

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

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