There are several plants with the common name 'black eyed susan' if you mean Rudbeckia hirta or Rudbeckia Goldsturm it does die back in winter and will grow again next spring, if you wish you can tidy it up a bit now. Of course you could mean Thunbergia Alata which is an annual, in this case you simply need to pull it up.

You do not need to do anything to your wisteria and we would need to know which clematis it is in order to advise on pruning.

Hi Moon Grower

Thanks for your help the black eyed susan is one that doesn't have a black eye I have lost the details on it I am afraid so I will just leave it and see what happens. I have quite a few clematis one I know is a montana the rest I will have to find the names and post another question then.