Comment #5 on issue 2832 by [email protected]: Clef transparent does not hide clefOctavation
http://code.google.com/p/lilypond/issues/detail?id=2832
Regarding comment #4: at the current point of time, the most recent patchset for 6498077 does not have this. It uses a "surrogate" field rather than "cause" as suggested by the comment I refer to as the source for the properties and thus can't be used out of the box for this purpose.
