Author Umberto (3)
I believe the answer is:
eco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">author umberto</span>' is the definition.<br/ ><span class="explanation-format__explanation">(Umberto Eco, 1932-2016)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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)" .)