I think you played the hand fine. Going for the flop checkraise is fine, since you likely have the best hand and the preflop 3 bettor will usually bet this flop every time no matter what he has. Turn play is standard. And on the river I can see why you called getting 10-1 pot odds. It seems obvious that the turn aggressor has a flush, but I still think this is a call online getting 10-1 simply becuz there are so many idiots out there that will pop this turn with Ad6d and still bet the river hoping you will fold. With no read I think it is ok to call this river, I have called many rivers in seemingly hopeless situations like these online and to be honest I am suprised at how often i did win.