Crossword Genius

Green prefix (3)

Ross

I believe the answer is:

eco

'green prefix' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for eco that I've seen before include "Umberto --, Italian writer" , "Green prefix" , "Umberto - - , novelist" , "Environmental group" , "Umberto -, Italian author (The Name of the Rose)" .)

I've seen this clue in the King Feature Syndicate, the USA Today, the Universal, the Newsday, the Penny Press, the LA Times, The New York Times and The Wall Street Journal.
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