In version 1.50, coming in the next couple of days, Fargo will do a lite render of RSS descriptions.
It passes the text through the global glossary.
It passes the text through your cmsPrefs.opml glossary, if you have one.
It passes the text through the Markdown processor.
This will help the text in the feed look good in whatever RSS apps your readers are using. But it will still leave macros unprocessed, and it won't use any local glossaries. And the pagetable elements, if you reference them, will be unevaluated.
These things are difficult, but not impossible. However there are lots of other things that are higher priority.
Also, you have to watch out for glossary items that depend on the runtime environment of Fargo-generated pages. Anything that depends on Font Awesome being present, or Bootstrap Toolkit, won't work. I do that in my smiley characters.
But the cheesecake glossary entry should render fine.
I want to spend some time using the new version myself (I'm using it now) before making it part of the main release. This is tricky stuff and I want to be sure I got it right.