In Clojure you know the number of arguments to a function and the name of functions and variables, and the code is all very well structured as an AST (being a Lisp).
So you can do a lot of refactorings with that such as:
Rename function, rename variable, rename namespace, extract constant, extract function, extract local variable, extract global variable, convert to thread-first, convert to thread-last, auto-import, clean imports, find all use, inline function, move function/variable to a different namespace, and some more.
The only thing is you can't change the "type" of something and statically know what broke.
