The term Vineyard Device is a crossword solution that can be completed with the word TRELLIS, which has seven letters. A TRELLIS is a structure made of latticed framework used to support climbing plants, such as vines. It is often used in vineyards to provide support for grapevines and other climbing plants. The TRELLIS also helps to keep the vines off the ground, allowing for better air circulation and easier harvesting.