Crossword puzzle clue "trees that yield light lumber"

to grind corn, wheat etc.

CACAO, (Nahuatl) a small evergreen tree of South America and the West Indies, from the fruit of which cocoa and chocolate are prepared

CAROB, (Arabic) the sweet-flavoured seed of an evergreen tree, aka locust bean

CASSAVA, a tropical plant whose roots yield a valuable starch, also CASAVA

EBONY, a dark heavy tropical wood, also EBON, HEBEN