Step 1: The hook
For a fly of this weight and size a jig hook is better choice, as it will snag a bit less. Just keep in mind you are going to lose your fly, and have some spare.
Here I used #10 Skalka Jig hook.
Step 2: Bead and Lead
I am using some seriously heavy metal - 4.6 mm Tungsten bead and a layer of flat lead.
Step 3: Tip
For the tip I am using 4 strands of UNI Neon thread, color Fluo Green. It will imitate the peeping caddis larva and - more importantly - act as an attractor.
Step 4: A touch of dubbing
To make the tip more pronounced I add a small ball of hot green dubbing; it will make the tip more pronounced.
Step 5: Hackle
A smallish partridge feather to imitate legs of the caddis larva and add movement to the fly.
Step 6: Finish the hackle
Wind the hackle, attach a thin gold tinsel.
Step 7: Body
Dub body of scruffy dubbing from back of a hare.
Step 8: Finishing touches
Counter rib the body and whip finish. Brush the fly vigorously with a velcro strip.
Take a step back and enjoy your work