Better to spend an evening here? (6)
I believe the answer is:
'better to spend an evening here?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
This is all the clue.
Can you help me to learn more?
(Other definitions for casino that I've seen before include "Gambling-club" , "Gaming establishment" , "Where some gamblers go" , "You can win a fortune here" , "Gambling house" .)