Crossword Genius

Optical device (4)

Ross

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5

lens

'optical device' is the definition.
(lens is a kind of optical device)

This is all the clue.

(Other definitions for lens that I've seen before include "Bender of beams" , "Camera component" , "Optical refractor" , "Aid for viewing" , "Photographer's accessory" .)

I've seen this clue in the Sydney Morning Herald.
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