Lay a short base of the gold 70 denier at the front of the shank only; on this fly the hackle goes on first.
Prep the Partridge: fold the fibers back on themselves, leave the hackle length you want standing above the eye, and snip the tip down to a small triangle for a solid tie-in point. Tie in and take three turns, pulling the fibers back on each turn. Zigzag the thread through without trapping fibers, then snip the stem and any loose fibers.
Pull the hackle fibers forward over the eye and park them there with a couple of loose wraps, checking there is still room at the eye.
Take the thread to the bend. Tail: 10-12 fibers of Mallard flank, wood duck, tips aligned, angled slightly down, about one hook gap long. Two wraps to check position, secure, and trim the butts; the dubbed body hides any lumps.
Catch in the Gold oval tinsel at 45 degrees, pull it flat, and bind it back to the tail.
Wax the thread and dub a fairly tight noodle of the cream dubbing (rabbit here). Take one wrap behind the rib tie-in to hide it, then a tapered Body two-thirds of the way up the shank.
Counter-wrap the rib, four or five turns, and snip it; soft tinsel won't helicopter off.
Wingcase: a Goose or duck slip, dyed yellow, a bit under a hook gap wide. Lay it on top with two loose wraps, check it from above, then secure.
Thorax: the same dubbing, a little less, dubbed tight and slightly thicker than the body. A couple of wraps, back over the wingcase base, then finish forward.
Pull the wingcase over and seat it; one wrap in front and one behind to lock it, then snip as close as you can.
Preen the parked Partridge fibers back with your fingers all the way round and wrap the head over their bases. Trim strays pointing forward rather than building the head up to bury them. Four or five turn whip finish and a drop of head cement; pick the body out with a dubbing brush if you want more fuzz.