I tried to come up with a tag for questions relating to the ux field itself - its career, training and other general aspects. I'd call it "meta", but, well, that's obviously not a very bright idea. For the time being I went for ux-field and tagged a few questions. I don't think it's the perfect term for it - maybe someone has a better idea?
P.S. In case you think that questions like that are off-topic, please flag/vote to close them, or open a separate question on Meta. This one is about the wording of the tag.
P.P.S. The subject doesn't mean "general questions on the subject of UX", but rather "specific questions on the general subject of UX" - which aren't the same thing.