Hello the best way to do this would be to make a simple child theme. If you’ve never made one of these before I would recommend this page in the codex for a good introduction.
You should only need 2 files in your child theme.
style.css
You don’t actually need to make any css changes but you’ll need to include the header information as shown on the codex page. Make sure you update the @import url("../twentyfourteen/style.css");
to @import url("../elucidate/style.css");
as this loads Elucidate as the parent theme.
functions.php
The tag lists are generated by the function elucidate_meta() in inc/template-tags.php As this is a pluggable function we can override it in a child theme so create functions.php and add this modified version of the function. (note that the tags code on lines 13-16 now only runs when you are viewing single pages.
I hope that helps, and thanks for using my theme. Let me know if you need any further guidance with this.