Gambling game (6,2,3)
'gambling game' is the definition.
(roulette is a kind of gambling game)
This is all the clue.
(Other definitions for roulette that I've seen before include "Form of gambling" , "sort of gambling" , "Casino game" , "Gambling game with spinning wheel and ball" , "Gambling game with small ball and revolving disc (8)" .)
'gambling game' is the definition.
(I know that Keno is a gambling game)
This is the entire clue.
(Other definitions for keno that I've seen before include "A bingo-like game" , "game of chance" , "gambler's choice" , "2 8 [CASINO GAME]" , "gambling game" .)
'gambling game' is the definition.
(I know that chemin de fer is a Gambling)
This is all the clue.
(Another definition for chemindefer that I've seen is " game!".)
'gambling game' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for chemin de fer that I've seen before include "French railway" , "Game like baccarat" , "proceeding along French lines" , "Variant of baccarat" , "Card game, gambling against the banker" .)