[gordo16]

I mean, this should probably be a snap-call, but more than the 5c I would be worried about being shown A4 here. The fact that he donks into you on this A23c flop makes me kind of suspicious about the strength of his hand. I would expect him to not lead if he as the 4c for instance, but since it hits the river, you can obv take it out of his range. I find it hard to believe that he would continue-bet the turn on that sort of board without a pretty strong hand on the turn (A4 obv qualifies). Then the river hits so many hands, his river c/r line with the 2nd nuts makes sense against so many of your hands, since he would reasonably be expecting you to vbet any high club here. All that said though, that analysis is only because you decided to post the hand, so I'm assuming you got cooler by either the 5c or A4. I think his range in this spot is mostly polarized towards an underfull, so I snap call the river c/r.