House of cards? (6)
![Ross](/clue/static/ross-mug.min.png)
'house of cards?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for casino that I've seen before include "Imitate" , "Building for gambling" , "Gambling place" , "used by gamblers" , "Scorsese film - Bond film if "royale"" .)