Lay a tan thread base on the front two-thirds of the shank and leave the thread hanging above the hook point. The extended body is not tied in far back.
Make the extended body: hold a length of yellow-gold synthetic yarn at both ends and spin it two or three times until it is a tight noodle, then bring your hands together and let it furl back on itself naturally.
Trim the fuzz and stray fibers off the furled body and tie it in above the hook point so it extends well past the bend. This is a long-bodied fly. Add a few extra wraps to smooth the tie-in and trim the front end.
Bunch a tan or light dun CDC feather and measure it against the extended body, about the same length, then tie it in with a pinch wrap where your thread is hanging, add a couple more wraps and trim the excess forward.
Smooth the tie-in area with a few thread wraps so the hackle has an even base to sit on.
Size a ginger hackle to about one and a half hook gaps, tie it in just ahead of the wing and leave the stem running forward to keep the underbody smooth.
Wind the hackle five or six turns, this is what floats the fly while the extended body sits down in the film, tie off and trim.
Pull the hackle back, take a few wraps to clear a spot, whip finish and add a drop of head cement.