citron
柚 centers on the citron fruit, a fragrant citrus often used in Japanese cuisine and culture.
柚 combines 木 (tree) with 由, which likely contributes the sound. It refers to the citron tree and its fruit.
The tree radical 木 beside 由 suggests a specific tree: the citron tree. Picture a tree bearing fragrant citrons.
For ユ, imagine you picking a citron from the tree: you -> ユ, and the fruit is a citron.
yuzu (Citrus ichangensis x C. reticulata)
cultivar of pomelo (Citrus maxima, Citrus grandis)
swallowtail butterfly larva (a pest of citrus plants)
condiment paste made from yuzu zest and chili peppers (chile)
yukou (Citrus yuko); Japanese citrus variety
sweet yuzu-flavoured steamed dumpling
citrus-grilled
Japanese aster (Kalimeris pinnatifida); false aster
green yuzu; unripe yuzu