Thanks for your question. When you write “a slider” I understand that to mean one of the many lightbox/slideshow/slider gallery plugins available for WordPress.
The overall answer to your question is the same as that for this earlier topic:
Flickr Style Gallery
If you have a particular plugin in mind, post your choice here and I can work with you to integrate it with MLA. Thanks in advance for any additional details you can provide.
It has been a month since my last post in this topic. I assume you have found a Slider plugin solution for your application.
I am marking this topic resolved, but please update it if there is anything else I can do to help you combine a Slider with MLA. Thanks for your interest in the plugin.