List Category Posts plugin – underline links [closed]

If you want to do this for every link from List Category Posts, you can add this to your theme’s css file:

.lcp_catlist a {
    text-decoration: underline;
}

Check this answer for more details on new features that can help you customize even more:

Since version 0.23 of the List Category Posts plugin, you can set
specific html tags and CSS for each element of the list.

If you just want to add this underline, then the best would be to use this new feature instead of a template.