I think I disagree with cowboy here. Rare that that happens. While I would never call a reraise UTG with A9 suited, Once I did I don't think I would fold to the overbet. Overbets like that are NOT usually big made hands (like it was here) but weak made hands such as Ax. Even if you assume his range is any set, any 2 pair, any top pair, I think this is a call getting 6 to 5. Of course, I'm more of a tournament player, and more people slowplay hands like top 2 early in tournaments and less people make big overbets, thus making me more inclined to want to call with top pair and a flush draw.