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 LA Times, the Newsday, the USA Today, The New York Times, the King Feature Syndicate and the Universal.
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