The term CITRON is represented by three crossword solutions: TREES (5 letters), ELLA (4 letters), and MELON (5 letters). Citron is a citrus fruit that is believed to have originated in India or China. It is a large, yellow fruit with a thick rind and acidic pulp. The word TREES is likely referring to the fact that citron TREES are grown in many parts of the world, including the Mediterranean, India, and the Middle East. The name ELLA is likely referring to the variety of citron known as Ella citron, which is a hybrid of citron and lemon. Finally, the word MELON is likely referring to the fact that citron has a similar shape and size to a MELON.