https://common-lisp.net/project/phemlock/
I have never been able to get one to work, though.
MIT Scheme also has an Emacs 18 compatible editor called edwin written in Scheme.
What didn't work for you ?
On Clozure, the IDE with Hemlock only runs on OS X--I use Linux.
The one in CMUCL might work, but I haven't tried it because they only have 32 bit support for x86.
I wasn't trying to be dismissive--I would really like to run Emacs on CL!
It would probably die out soon. XEmacs is one of the longest living Emacs forks and even that is dead(ish).
Still, I'd put up some money for this.
(This post was written inside EXWM ;-)
Is this something we care about? RMS doesn't own lisp-based text editors.
[1] Not without reason since his foresight has been correct wrt privacy, civil rights, etc.