The term 'TRIMS, AS A TREE' can be summarized as the process of pruning a tree to maintain its health and shape. LOPS is the four letter solution to this crossword, and it stands for 'Lopping, ' which is the act of cutting off branches from a tree in order to control its size and shape. This process is also known as trimming or pruning, and is done to promote healthy growth and reduce the risk of disease.