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 Wall Street Journal, the Penny Press, the LA Times, the USA Today, the Newsday, the Universal and The New York Times.
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