The term 'Tree LOCUST' is a combination of two words, 'Tree' and 'LOCUST'. The first word, 'Tree', refers to a woody perennial plant, typically having a single stem or trunk growing to a considerable height and bearing lateral branches at some distance from the ground. The second word, 'LOCUST', refers to a group of swarming, short-horned grasshoppers of the family Acrididae. The crossword solution for this term is 'ACACIA', which is a genus of shrubs and trees belonging to the subfamily Mimosoideae of the family Fabaceae. Acacias are native to tropical and subtropical regions of the world, particularly Africa, Australia, and South America.