Crossword Genius

Being new, makes a grand change for Rene (5)

Ross

I believe the answer is:

green

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'being new' is the definition.
(thesaurus)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for green that I've seen before include "Consultative document" , "Eco-friendly" , "17's colour" , "driver may go on it" , "raw, as > part of course" .)

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