Clojure is a language that is both a Lisp and has a Tree-sitter enabled major mode. In this case, you could use either Symex’s Lisp parser or Tree-Sitter parser. But, as the Lisp parser is more mature and provides a tailored experience for Lisp, it’s recommended when using Symex with Clojure, at least for the moment, that you use clojure-mode rather than clojure-ts-mode.