The term 'offensive line' refers to a group of five players on the offensive side of American football. The group consists of two tackles, two guards, and a center. The job of the offensive line is to protect the quarterback from the opposing team's defense and to create running lanes for the running back. The crossword solution for the term 'offensive line' is BARB, which stands for Back, Attack, Rush, Block. This acronym is used to describe the four main responsibilities of the offensive line: back up the quarterback, attack the defensive line, rush the quarterback, and block for the running back.