The term 'Lettering Guide' can be summarized by the solution to the crossword clue 'STENCIL, ' which is a seven-letter word. A STENCIL is a template used to create letters, numbers, and other symbols on a surface. It is often used in crafts and art projects, as well as for industrial purposes such as labeling and marking. A lettering guide is a type of STENCIL that is specifically designed to help with the creation of lettering. It typically includes a variety of different fonts and sizes, allowing for a wide range of lettering styles.