I don't really see problems with your plant. It is quite normal to look like that when it is waking up from sleep. If you want to do something put a handful of Osmocote now and some compost around the base. After flowering cut it in half and add a bit more fertilizer. It will flower for you later again. I don't know what kind of clematis you have but most likely something from large flowering group. This group flowers on a previous year growth. In general, it is better to prune it after flowering. If you do it before growth starts be careful when cutting the stems. They often look all dead. I usually start cutting each stem by small pieces until I see green center, which means a live stem. Good luck.
