When Common LispWorks starts up, the Listener tool does not appear automatically as stated in the Common LispWorks User Guide .
If you wish to have a Listener tool appear on startup, then add this form to your personal initialization file:
(define-action "Initialize LispWorks tools"
"Make a Listener Tool"
#'(lambda (screen)
(capi:find-interface 'lw-tools:listener
:screen screen))
:after "Create default the tools")