Not a Common Lisp implementation but Clojure can find the source for a symbol (provided the source code file is in the classpath) with the clojure.repl/source f

Not a Common Lisp implementation but Clojure can find the source for a symbol (provided the source code file is in the classpath) with the clojure.repl/source function (doc: https://clojure.github.io/clojure/clojure.repl-api.html#clojure.repl/source https://clojure.github.io/clojure/clojure.repl-api.html#cloj... .) All development environments support jump to definition.