Crossword Genius

Its use can be seen on reflection (6)

Ross

I believe the answer is:

mirror

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'reflection' is the definition.
(thesaurus)

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(Other definitions for mirror that I've seen before include "copy of > tabloid" , "Reflecting glass" , "newspaper" , "in which driver glances back" , "Alice went through one (Carroll)" .)

I've seen this clue in The Irish Independent.
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