Is it supposed to look like this ?

Just losing its leaves for winter. Soon you should see the small leaf buds that will emerge in the spring.

It’s not an evergreen Phoenix there doesn’t look anything wrong with it to me, at this point in Autumn,

Let's hope so Shrub! All the others look fine.

I don't know that particular one but www.rhsplants.co.uk/plants/_/clematis-koreana-amber-wit141205-pbr/classid.2000028062/ says it is deciduous so maybe it's just losing it's leaves for the winter.

I don't know much about varieties of clematis, but the ones we have which die off in winter and shoot and grow ten foot in spring are looking very similar. The common Montana is still rampantly green but isn't deciduous and looses its leaves later.