Thanks everyone! After posting, LispWorks support emailed me back, pointing to their CAPI instead of CLIM. They provided some generous free support to help me ID the one menu feature I needed, and I have enough to start my prototype.
It was alot of googling on my specific question before I reached this forum. (Should have googled Lisp Forum.) Then the forum registration process asked "what are those round things"; almost failed that. BTW they're curvey things, not round! partly round things, even.
It was an interesting experience taking up Lisp and Emacs again after 26 years, and no programming since roughly 15 years ago! Such a rich language, and tools appears sweet so far, these days. The LispWorks editor parses the code and displays using color; perhaps this is so common now you'll roll your eyes. Free hypertext documentation on Common Lisp itself. Naaa iicce LET the hacking begin!!
p.s. Common Lisp could use public/private...but I guess it's too late for that.