[Moozh]

One question: which flop card is the club?

Personally, I'd probably always call here. That doesn't mean it's the correct play.

Since the theme of these posts seems to be hand ranges, let's take a look at MP. His limp doesn't tell you much at all, but his flop bet does. If he's a bit loose/passive, you can usually count on him having at least a pair to bet out on the flop into a field that large. When the betting is raised and 3-bet back to him, his call definitely shows he has a pair. Since the guy is a bit loose, but not overly so, it seems unlikely that he would call with a weak jack (but not impossible). On the other hand, it seems very likely that he could call down with a middle or weak ace if he had a backdoor draw to go with it.

That's why I'm curious which flop card is the club. If the ace of clubs is out, then his possible backdoor flush draw would have to contain at best a jack (and possibly, though unlikely, a six). If the jack or the six is the club, then he could potentially be holding Ax of clubs, which would make it much more likely that he could have hit the flush.