The term 'Simple Flower Cluster' is a type of inflorescence, which is the arrangement of flowers on a stem. The crossword solution for this term is 'Raceme', which is a type of inflorescence where the flowers are arranged along an unbranched stem in a pattern of one flower per node. Racemes can be simple or complex, and they often have a central axis with lateral branches. Simple flower clusters are typically racemes with a single main stem and no lateral branches.