Tie in a brown Antron trailing shuck at the bend, one shank length long, angled down to sit in the film like a struggling emerger.
Wrap a segmented olive biot abdomen forward to the 60% mark.
Tie in an olive-gray CDC or poly wing tuft standing forward/upright at the 65% mark.
Wind a grizzly-olive hackle 3-4 turns through the thorax and clip the bottom flat so the fly sits low. Why: a cripple rides half-drowned, so the flat-bottom hackle and dangling shuck imitate a stuck-in-the-shuck drake.
Dub a dark olive thorax and whip finish behind the eye.