The term 'track transaction' can be broken down into two crossword solutions: BET (3 letters) and WAGER (5 letters). Betting is the act of wagering money or something of value on an uncertain outcome. It is a form of gambling that has been around for centuries, and is still popular today. Wagering is the act of placing a BET, usually with money, on the outcome of an event or game. It is a form of risk-taking that can be both exciting and profitable.