Pick any book with has the name Lisp on it, take example code and try to run it in Cloure.
Chance that it does not work is high.
Now change the code that it runs. Chance that you had to rewrite the code mostly is high.
It's a dialect of Lisp in the sense that it is an incompatible branch / fork with a Java runtime (it's a hosted language) and a bunch of newer functional data structures replacing old-fashioned lower-level stuff from Lisp.
Chance that it does not work is high.
Now change the code that it runs. Chance that you had to rewrite the code mostly is high.
It's a dialect of Lisp in the sense that it is an incompatible branch / fork with a Java runtime (it's a hosted language) and a bunch of newer functional data structures replacing old-fashioned lower-level stuff from Lisp.