* "The government decided to excise the tax on imported goods." (This means they removed the tax.)
* "The editor excised the offensive paragraph from the article." (This means they removed it.)
* "The surgeon excised the tumor from the patient's body." (This means they removed it surgically.)
You can also use "excise" in a more figurative sense:
* "She tried to excise the painful memory from her mind." (This means she tried to erase it.)
The key thing to remember is that "excise" always implies the act of removing something, whether it be a tax, a paragraph, a tumor, or a memory.