Posted: 14/06/2013 at 14:12
Deffo don't throw it away as Wintersong suggest. I would cut out any dead stems, and hopefully it will regrow from below ground. I have several Clematis is terracotta pots and they do fine, but they do need extra attention in terms of feeding and watering.
Wilting and die back can be quite common in group 2 clematis, especially newly bought ones. They can either put on too much top growth so the roots can't support them anymore, or because they aren't being treated with commercially available fungicides succumb to wilt. But generally they do recover and once they get older and more established are more robust.