Author Umberto (3)

I believe the answer is:

eco

'author umberto' is the definition.
(Umberto Eco, 1932-2016)

This is the entire clue.

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

I've seen this clue in the King Feature Syndicate, The Wall Street Journal and the Newsday.

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