Comment #10 on issue 2717 by [email protected]: Patch: Implement \hide as a shorthand for \tweak #'stencil ##f
http://code.google.com/p/lilypond/issues/detail?id=2717
What about using it the other way round?
\new Voice \with { \hidden StringNumber } { c\3 }
\hide Accidental cis-\hide\3
looks quite convincing for me, but I am a non-native speaker.
