Certain ticket holder, 6 letters
Croupier's customer, 6 letters
Hialeah Park habitu, 6 letters
Person making a wager, 6 letters
Roulette player, e.g., 6 letters
First leg of a daily double?, 10 letters
Advice to a compulsive gambler?, 15 letters
Backers at the track, 7 letters
Everyone in the pool, 7 letters
Ones placing trifectas, 7 letters
Race track supporters, 7 letters
They lay it on the line, 7 letters
Wager on a first place finish, 8 letters