The term 'TRACK PRIZE' refers to the monetary rewards given to the winners of a horse race. The first crossword solution, 'STAKES', is a term used to refer to the prize money offered in a horse race. The second solution, 'PURSE', is another term for the same prize money. The third solution, 'WINNERSPURSE', is a combination of the two words and is used to refer to the amount of money that the winner of a horse race receives.