This one's been around for a while in various forms; thought the front-hackled version looked cool. Tried tying the tail down with tag end of thread but found 2 bobbins worked better for me.
hook - Tiemco 5212
thread - Danville 6/0 brown (x2)
tail/back - deer hair
body - 1mm foam orange
hackle (body) - brown
hackle (front) - coachman brown
Part 1
mash barb, attach thread at 70% point and wrap back to point above barb
tie in a strip of foam (about 3mm wide)
tie in hackle (undersize by one hook); let bobbin hang at tie-in
start second thread bobbin at 75% mark
wrap foam forward and tie off/trim at 70% mark
wrap body hackle forward; tie off and trim
clean and stack a clump of deer hair
measure for length (extend hook gap length behind)