Which was not an element of Clay's American System?

One element that was not part of Clay's American System is the establishment of a national bank. Clay's American System focused on three main components: protective tariffs to support American industry, a national bank to foster commerce and stabilize the currency, and internal improvements such as roads and canals to enhance transportation. Therefore, while the national bank is a key feature, it is not considered a separate element but rather part of the broader framework.