You can set up your user packages to use CLIM as follows:
(in-package :user) (defpackage "FOO" (:use :clim-lisp :clim ))
The package :clim-lisp is a version of the :lisp package that shadows some of the Common Lisp symbols. The :clim package is the exported CLIM interface.
CLIM 2.0 User Guide - 01 Dec 2021 19:39:02