While I understand this kind of guide (showing how things are done in one language/ecosystem vs another), is there such a thing as a Clojurist that would have benefited from it?

I'm not asking whether there are Clojurists. Of course there are.

I'm asking whether there are people that primarily and only know Clojure, and thus would benefit from a translation guide between Clojure and Rust, instead of say between C or Java or Python or Ruby etc and Rust.

I'd think that anybody who uses Clojure was already familiar and/or proficient in some other language before, much more major than Clojure.