LispWorks and Liquid CLIM both make use of the following packages:
CLIM-USER--This is analogous to the USER package. It uses CLIM and CLIM-LISP.
COMMON-LISP-USER--The USER package has been renamed.
COMMON-LISP--The LISP package has been renamed.
CLIM-INTERNALS--For internal use only.
CLIM-SILICA--For internal use only.
CLIM-SYS--Exported, portable Lisp system utilities not officially part of CLIM, such as multitasking, resources, etc.
CLIM--The official, exported CLIM functionality.
CLIM-LISP--CLIM's carefully constructed LISP package. It imports, shadows, and adds symbols to create a portable namespace for CLIM.
CLIM-DEMO--An example of a newly-defined, user-level package that uses CLIM and CLIM-LISP.
CLIM-UTILS--Contains unexported Lisp utilities used by the Lisp system.
The official way to make a package for CLIM is as follows:
(defpackage "MY-CLIM-PACKAGE" (:use :CLIM-LISP :CLIM :CLIM-SYS))
Common Lisp Interface Manager 2.0 User's Guide - 20 Sep 2011