Crossword Genius

Optical toy (12)

Ross

I believe the answer is:

kaleidoscope

'optical toy' is the definition.
(I've seen this before)

This is all the clue.

(Other definitions for kaleidoscope that I've seen before include "colourful viewer" , "Diverse variety of sights" , "Toy making coloured patterns" , "A changing pattern of colours, shapes" , "Optical pattern-making toy" .)

I've seen this clue in The Mirror and The Telegraph.
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