Answer:

ECO

AnswerCrossword Clue
ECO"The Name of the Rose" author
ECOEnvironmental prefix
ECOSphere opening
ECOSystem starter
ECOAuthor Umberto
ECOSystem starter?
ECO"Foucault's Pendulum" writer
ECOBio system start
ECO"Foucault's Pendulum" author
ECOGreen prefix
ECOGreen product prefix
ECOPrefix with "conscious" or "friendly"
ECOSystem or type starter
ECOSystem start-up?
ECOEarth-friendly prefix
ECOEnvironment (comb. form)
ECOPrefix with system or logical
ECOThe Name of the Rose author
ECOMisreadings author
ECOGreen (prefix)
ECO"Misreadings" author
ECOGreen, in a way
ECOPrefix on tourism
ECOGreen, in a sense
ECOPrefix on tourist
ECOUmberto the author
ECO..-conscious
ECOGreen
ECOPrefix with logical and sphere
ECOWriter Umberto
ECO"The Mysterious Flame of Queen Loana" novelist
ECONovelist Umberto
ECOConservational prefix
ECO"Baudolino" author
ECO"Il nome della rosa" novelist
ECOFriendly opening?
ECO"The Name of the Rose" author Umberto
ECOBorges contemporary
ECO...-warrior
ECO1989 Premio Bancarella winner