Crossword Clue:

a system of betting

AnswerCrossword Clue
PAROLIParlay betting system
PARI... -mutuel: racetrack betting system
MARTINGALEDouble-up betting system
BOOKIECASEPolice investigation of a betting house?
STAKINGONESCLAMBetting a buck in Vegas?
SKETCHBOOKIESDo drawings in a betting parlor?
DOUBLEORNOTHINGCall in many a betting game
ALSORANHorse named on a crumpled betting slip