Crossword Genius

Light refractor (5)

Ross

I believe the answer is:

prism

'light refractor' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for prism that I've seen before include "Cut-glass object" , "Female character in The Importance of Being Ernest -- optical device" , "Triangular piece of glass, optical device" , "source of colourful viewing?" , "Refracting glass" .)

I've seen this clue in The Guardian, the LA Times and the Penny Press.
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