Clematis query

           

It's in a alley at our back door.  The alley runs roughly north/south, north at gate end.  RH neighbour's wall faces west. The sun hits the alley about midday for about a couple of hours. Used to have a huge silver queen euonymous until it got ravaged by scale insect and had to go. Could always try that again as I've got some cuttings. A rose sounds nice if it would cope with the shade.