I've to find out what kind of work Clanden does for the family. I talked to cachino, clanden and trioke, they're not giving me the info. I think everyone else in the casino don't talk that much. What should I do now?
When I did this I wasn't able to get Clanden to tell me anything either. I was able to get Triosk to talk about his weapon shipments and once I got Big Sal to release him from his contract, I think he gave me some materials that allowed me to sabotage the weapons.
I guess try talking to Triosk again and see if you can find an option to get him released from his contract.
There is a secret compartment that you need to lockpick behind the big round-shaped bed in the room where you meet clanden. Also, if you go to the locked door on that floor, you will find the body of a dead hooker that he has mutilated. If you have a high enough Medicine level, (which I don't, so this part is speculation) that will give you the info you need to get him talking...