ex:

{:fn-to-exec 'clojure.string/join}

If it's just a qualified symbol, then requiring-resolve should work. If it's a function definition, like (fn [x] (do-stuff x)), then you'll need to use eval.

no, not a fn . Just a symbol

yes, requiring-resolve is a good thing to apply here

this is actually a long-standing problem we've been talking about in the clojure team. most systems eventually have this need and we've been considering a standard tagged literal or something that could be resolved on read. like imagine #'foo/bar that reads as a real var (or #var foo/bar or something else)

see https://clojure.atlassian.net/browse/CLJ-2165 for some work on this

otherwise you have to read edn, then apply some walk to resolve certain things back to fns/vars