Answer: ecos

AnswerCrossword Clue
ECOSEarth Friendly Products detergent
ECOSAuthor Umberto and kin
ECOSWriter Umberto and family
ECOSReverberations in Spain
ECOSAuthor Umberto et al.
ECOSUmberto and kin
ECOSBelonging to Umberto
ecosECO, ecology (an environmental science)