The term PLANT WITH COLORFUL FLOWER CLUSTERS can be solved by the 8-letter word HYACINTH. Hyacinths are a type of flowering plant that is native to the eastern Mediterranean region and the Middle East. They are known for their colorful clusters of flowers, which come in a variety of colors including pink, blue, purple, white, and yellow. Hyacinths are popular garden plants and are often used in floral arrangements.