I've caught fish on the clinch using brassies but not many, had better luck with weighted soft hackle with, get this, a red bead head, casting up stream in heavy water.
I read in a book by Dave Hughes that bassies imitate cadis but I never see any on so. ho. If that is the case , probably a good bug for the Lower Holston.
Saturday was a different day, sunny then overcast with some wind. I will say, brassies don't work in thin water and that is where I caught all my fish.