I want top identify a clematis
It is large flowered, dark violet/blue with black anthers

Only way to even attempt any suggestions is by adding photos.

Done that

Sorry but where?

I think it must appear as a new question

I just looked at your profile, you have only made 3 posts, all here in this thread.
Pictures can be uploaded here by using the Drag and drop or 'Chose File' option below post. They will appear in the post as a code first, something like this:
[ lightbox ]473570 [/ lightbox ]
Click preview to make sure the correct photos are added before clicking the Finished button to post.

I have made a new question with the image and preview to ensure it was there

I'm sorry but you didn't. There are no new questions nor images.
Just spinning in circles here I'm afraid.