Unless it's a pure bluff, at best yr splitting with another Kx hand. Fold with no read. Annoying hand though, back in my 10nl days i woulda probably called this out of sheer frustration lol.

Just noticed you said the villain was a TAG. He open limped so not too many hands make sense here if he is truly tight aggressive, KJ, KQ maybe, or a slowplaying AK, AA, KK. If he is a TAG why is he calling you down unless he is trapping? I can't see him playing Ax like this.