Q.Has My Clematis Got Wilt?
My clematis Princess Kate has suddenly wilted in the last month. I have read about wilt and it seems to happen in the summer but this started in October. This plant was bought and planted earlier this year and had been doing really well until recently

Certified GKH Gardening Expert
It looks like it has been through some freezing weather. Princess Kate clematis is deciduous and should lose its leaves in the fall. In the spring, cut back the old vines above a node to 15-20 cm. (6-8 inches) from ground level. New stems should grow, followed by flowering.
If it is wilt, the roots usually survive and send up new shoots in spring.
https://www.gardeningknowhow.com/ornamental/vines/clematis/clematis-wilt-treatment.htm