The term 'Autumn Blossom' is a poetic phrase used to describe the beauty of the season when leaves change color and flowers bloom. The crossword solution for this term is 'ASTER, ' which is a genus of flowering plants in the family Asteraceae. Asters are known for their daisy-like flowers, which come in a variety of colors including pink, purple, white, and blue. They are often seen blooming in the fall, making them a perfect symbol for the beauty of autumn.