The term LETTERING DEVICE can be solved by the crossword solution STENCIL, which is a 7 letter word. A STENCIL is a device used to create letters, numbers, and other symbols on a surface. It is typically made of thin sheet material such as paper, plastic, or metal, with a design cut out of it. The design is then placed onto a surface and paint or ink is applied over it, leaving the design in the desired shape. Stencils are commonly used for signs, wall art, and other decorative purposes.