The term 'Staff of Life' is a phrase used to describe the basic food items that are essential for sustaining life. In this crossword, the solutions MEAT (4 letters), BREAD (5 letters), EDITORS (7 letters), and WHOLEWHEATBREAD (15 letters) all contribute to this phrase. MEAT is a source of protein and other nutrients, BREAD is a staple food item, editors are responsible for ensuring accuracy in written works, and wholewheatbread is a type of BREAD made with whole wheat flour. Together, these four items form the 'Staff of Life'.