The term ONE AT THE END OF THE LINE can be solved by two crossword solutions: HEIR and WIDERECEIVER. HEIR is a four-letter word that refers to a person who inherits or is entitled to receive a share of the estate of a deceased person. WIDERECEIVER is a twelve-letter word that refers to a football player who plays the position of wide receiver. Wide receivers are typically positioned at the end of the line of scrimmage and are responsible for catching passes from the quarterback.