That is not a clashed die. It what is called ghosting, where a raised outline of the opposite side is visible through the coin. Nice die crack also.
Ghosting is pretty common on certain series, this being one of them. It's famously notorious for British penny coins between 1911 and 1920 as well. It's caused when too much metal is required to fill the die upon striking on one side of the coin compared to the other side. It's a defect of the coin design rather than technically a mint error.
I've noticed that on the British pennies you mentioned and always wondered about it. thanks for the info.