[Smoothcall]

Well usually a recheck like that is to make sure he has those 2 clubs like he thought and not one spade instead. But these possible tells are not worth reading into in limit holdem as it might mean nothing. Some people do that on a regular basis out of habit. He could be doing that for your benefit to confuse you. Bottom line is its not reliable enough a tell to not play the hand the way its supposed to be played. Which is value bet the river! If he had you before most likely would have heard from him before. His hand might be the A2 of clubs but agian it could be anything really. All you know for sure is you have Ak and have not got raised yet so the 2 shouldn't scare you from betting. And the idea of checking hoping he will bluff will not work nearly enough. Most people know(especially observant ones) not to bluff when a solid player bets all the way then checks river. The solid player woulda bet again if he was bluffing(he's usually not gonna just give up after going that far on a busted hand). If he's checking its usually because he has something and will probably payoff. I'm gonna take a gamble here and say his hand was KQ clubs. Because A2 clubs less likely to call preflop. KQs is a possible holdling that a somewhat solid player might make there.