He can have quite some flushes, Axcc,TJcc,QJcc,TJcc,9Tcc,89cc,78cc. I think flop is allready close when face a x/r without a club in our hand. As played fold rvr. Like you say its a not a great spot for him to go crazy on, we have a stronger range on this Kxx board, because we prob have more flushes, and AK,KK+.

Villian has way more suited hands than offsuit ones in his SB calling range, so you don't need to protect against single clubs too much. He has some PPs, but that's it.
Because of that, checking back the flop seems good.

I'm never c-betting here without Ac. I rather just go with my showdown value and try to go to the river cheap as possible. Your hand can't stand heat OTF so your bet only makes worse fold and doesn't accomplish much. Usually this 3.5x x/r represent sets or low flushes (and I think people are a little unbalanced on this x/r because some of the huge draws like Acxx usually x/c) and you're drawing dead here. As played, I fold the flop. 

Flop play is debatable, like pointed out by other posters. Not sure whats best my self. 

If villain is heavy check raiser in general, then definitely like the checking back option, mainly for the reasons that Chael pointed out.

I think river has to be a fold, as this is not at all a good bluffcatcher and we should even have a bunch of legit good hands that get to the river. I think villain should be worried when that river rolls off with 7c8c type of hand and shouldnt be able to value shove it, maybe not even with his good flushes and should be checking always?? People in general probably overplay their hands here at NL100 and lower.