David, here's one that you can play around with and alter to your liking. It will be hot in almost any fashion that you choose to tie it in. The critical thing right at the moment is the size of hook that you use. The flies that are hatching off right at the moment on the South Holston are about a size #26. They may be a little larger on the Clinch River.
Hook: Tiemco 2487-#22-26
Thread: Black Unithread 8/0 or other 14/0
Weight: Lead wire or non toxic wire tied in at the hookbend to produce a slight hump or colored red or amber wire wrapped for an underbody effect
Body: Black or Olive Brown Micro Tubing
Air bubble:Optional-clear bead
Gills: White poly pro yarn or tip segement of white ostrich herl. This is tied in at the hookeye and may need to be tied in before starting the body. Some people may add a coating of clear epoxy or Knot Sense to show a smooth body. Either will catch fish.
The feeding usually starts off with the fish feeding on emergers and showing a slight bulge in the surface as they take the fly. If the conditions are pretty warm, you may see this change to taking dries. Adjust accordingly and good luck.
* *Hugh Hartsell---East Tn.