Illustrator Clipping Mask Difficulties

[Sheepdisease]

Hello there, I am trying to create a clipping mask so that the rounded curve is contained within the actual shape (the shape needs to clip the excess which runs outside) and I also want the curve to shade the shape. The idea is to make it look more like rope.


Can anyone please let me know how I can do this?





Illustrator CS6 64bit

Many thanks