As Nargil points out, it's difficult to do a 100% silo and maintain user experience, especially if using Wordpress. However, don't let that prevent you from implementing the concept, because it has value.
Take the "authority" out of the equation, and where practical, take a page on a site where it makes sense (in the text/content) to link to inner pages from it. This is really effective on larger sites where there is a lot of content.
The idea is, to make certain pages on your site "authority" pages (on the main subject) that link to related content deeper in your site, then from those pages, link back to your "authority" page. As well, where practical, link from those inner pages (in the article text) to the other inner pages that make up the link structure from your main "authority" page.
I was pulling my hair out trying to do what some call a real silo structure on Wodpress, but set it aside and just focused on making "authority" pages that link to inner content. I did this on one page in one of my sites, to start, and linked to inner pages naturally from the text/content (not sidebar or footers, but in the actual text of the page). I linked to about ten inner pages that were related and a few weeks later, that "authority" page bumped over from middle of page two in google, to bottom of page one. Few months later, seven keywords for that page are now top 5/6 on google. The inner pages are ranking much better now too.
Here's an example:
Let's say you have a page about: California Drivers License
You have some inner pages about:
under 21 California drivers license
California provisional drivers license
California driving courses
California defensive driving
lower insurance rates for California drivers
etc.
Make the main "California Drivers License" page the "authority" and incorporate all those related pages into the content, with a natural contextual link to those inner pages. From those inner pages, link back to the "authority" page with "California Drivers License" as the anchor. Where natural, link from one inner page to another in the same "circle."
