The term 'LAWN DEVICE' can be broken down into two words, 'LAWN' and 'DEVICE'. The crossword solution for this term is 'Edger', which is a five-letter word. An edger is a gardening tool used to create a clean, crisp edge between a LAWN and a sidewalk, driveway, or flower bed. It is typically used to trim grass and weeds that have grown over the edge of a hard surface. Edgers are available in both manual and powered versions.