The only anchor tags that can be styled (that I'm aware of) are a, a:link, a:active, a:visited and a:hover.
Normally, when people use this tag it's to jump from one area of the page to another, and the opening and closing tags are usually back to back with no space in between that would be affected by underlining, e.g.
<a name="gotothisparagraph"></a><h2>Featured Paragraph</h2>
and so forth. How are you using this anchor tag?
Anyway, to answer your question notwithstanding the above, you can designate a class, "name" that has no underlining, like this:
a.name {
text-decoration: none;
}
OR
.name {
text-decoration: none;
}
Then in instances where you want to invoke this style, do so like this:
<a class="name" name="sometext"></a>
Of course you can call the class anything you want if you don't want to call it "name."