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Public perception (6)

Ross

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6

optics

'public perception' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for optics that I've seen before include "Organs of sight, eyes" , "The scientific study of light and vision" , "Drink measuring devices" , "Science of vision/light" , "Devices to measure out alcohol" .)

I've seen this clue in the Newsday.
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