This trick is similar to the more common Angel return, except in that trick the catcher holds arm and the OPPOSITE leg.
After a normal wrists catch, swing into the apron and lift your right leg up to the catcher's left shoulder. The catcher takes the right leg and lets go of the left hand. Turn into a star shape. Reach for the bar with your left hand. At the peak, let go and take the fly bar with both hands. Of course, if you prefer, you can do everything with your left leg etc...
You can find out more about this trick in my books: