I don't understand your question. I take clipart to mean individual pieces of art such as a picture of a person, car, etc. that can be combined with other images and design elements to make a composition. Isn't that what clipart is?
I don't do any promotion to think of. I just try to give thought to effective keywording. As you can see the vector art itself can be fairly intricate, but the themes for these files are somewhat basic. I try to produce elements that graphic artists can use in their work, but I am not necessarily producing the finished product (if that makes sense). I also try to produce a large number of vector elements for every file so buyers feel like they are getting a good variety in my vector collections.
I am still going to be producing vector art, but I am going to start experimenting with Photoshop developed images. If they sell well, I will make more.
I do the same as MG, lots of variation that allows the customer to pick what they want. Only got one image on here at the moment. https://www.dreamstime.com/stock-images-buttons-v-coloured-effects-suitable-web-designs-image33853464
But all my other files work the same way on other sites.