Notice the torso front... It has an opening which is tied back...
I DID have this shape, but now I'm cheating XD;;;
I went down to a dry cleaners to borrow a trouser press, I've put in a REALLY defined pleat, to give the effect of it being folded over. I founnd a button that looked like a knot, and just added a trouser hook to hold it in place!
It looks a bit off, but with the little time I have left... It'll do! XD