It would've been mutually recursive if Lisp (language) stood for something else which referenced Lisp (contest). But it doesn't, so you probably discovered a new type of recursive acronyms.

Hurd is an example of mutually recursive acronym:

"The GNU Hurd project is named with a mutually recursive acronym: "Hurd" stands for "Hird of Unix-Replacing Daemons", and "Hird" stands for "Hurd of Interfaces Representing Depth.""

http://en.wikipedia.org/wiki/Recursive_acronym