I fished the Clinch last Sunday for the first time in quite a while. Only fished about 2 1/2 hours. I am out of shape for the 6x fishing. I can say the fishing was pretty based on what others said. I popped off three fish on the hook set and managed to land one fish and it was a pretty ~ 15" male, full spawning colors. I fished above the weir dam, just below the steps at what is called the canoe launch. Fished a tandem; zebra midge and rusty bh midge. Kept losing the bottom fly. I heard that Miller's Island was fishing better (may have been the fisherman!)
They just have not turned it off much lately and I actually fish the park or over on Snowbird Creek in Robbinsville, NC mostly.
There are trails all along the TVA access below the dam for about 1.5 miles, maybe more, and then about a mile of access if you park at the jail on Hwy 61 and walk in from there. Another spot it the Millers Island access and the fishing can be pretty good there, mostly midges or small bh pheasant tails, scuds. The flat water above Miller's can be good as well and often noone is fishing there (midges). There is also a church being built which I understand has parking which will cut the walk (to the shoals upriver). I bet most of the fish are upriver right now trying to spawn.
Any specific questions; I will try to answer and will refer others to your site.
Best,