Usually the best therapy is to work on cues, probably exactly what your daughter was doing! My mom does this a lot (so do I, actually) and when she does I give her "hints."
My mom and I were both diagnosed with hypothyroid this fall. Since low thyroid can lead to cognitive changes, I suspect that was contributing to our word-finding issues. I don't think I do this as much now I'm taking the hormone, but I haven't been tracking it.
Welcome to the NET, by the way!