The term 'ONE OF FIVE IN YAHTZEE' can be solved by the three letter word 'DIE'. Yahtzee is a popular dice game that was first marketed in 1956. It involves rolling five dice and attempting to score points by getting certain combinations of numbers. The five dice are referred to as the 'Yahtzee' and each one has six sides, numbered one through six. Therefore, the term 'ONE OF FIVE IN YAHTZEE' refers to one of the five dice used in the game.