The term 'Big Name in Bars' can be summarized by two crossword solutions: CLARK (5 letters) and MARS (4 letters). CLARK refers to William CLARK, the founder of the American candy company CLARK Bar. The CLARK Bar is a chocolate-covered peanut butter crunch bar that has been around since 1886. MARS refers to Forrest MARS Sr., the founder of the American confectionery company MARS, Incorporated. MARS, Incorporated is best known for its iconic chocolate bars such as Snickers, M&M's, and Twix.