[nerdponx]

It's not Lisp-as-in-Common-Lisp. It's closer to Scheme than to CL.

But it's "a Lisp" in the colloquial sense that it uses s-expression syntax and has macros.

[lispm]

Not s-expressions in the traditional Lisp definition of singly linked lists. In Lisp (a . b) is a cons cell with two symbols a and b. In Clojure it is some complex data structure with three elements a, ., and b.