Yes that is from a die clash. The same clash that causes the spitting eagle which seems to be partially present on this coin. The spot you are seeing is from the area where Washington's Eye meets his nose. If you look at the obverse you will notice a very similar diamond shape in that area. There are overlay pictures but I don't have one handy.
This thread is almost 5 years old. You need to start a new thread to get answers. And photos of both sides of the coin should be posted in full size.