If the turn made villain a flush you have multiple redraws (4 outs to FH, 6 outs to the nut FD). If the villain flopped a straight or set you hold 13 outs.
Villain's overshove range includes any A-high two pair here as well, a possible flopped str (again you have redraw outs in FH, nut flush)...
I think if we construct his range as any smaller 2P, any two spades, JQo, TT or AQ AJ (shoving TP + gutshot + possible FD) we probably have solid call equity. I couldnt let this go either.