Not being able to easily define what you do isn’t necessarily bad. Easily definable things are things that have been done so much, we know exactly how to categorize them. Name them. Label them. Sort them.
So if what you want to create is just another X, then great. You’ll be able to define it with ease.
But if you’re having trouble calling a spade a spade, maybe that’s because you don’t have a spade.
And maybe that’s a good thing.
In fact, maybe it’s necessary.