ClaveSol = \relative c'{
    \cadenzaOn
    \clef treble
    \key c \major 
    <c e g>4 \bar "|." 
}

ClaveFa = \relative c{
    \cadenzaOn
    \clef bass
    \key c \major 
    R4 \bar "|." 
}

\score { 
    << 
        \context PianoStaff <<
        \set PianoStaff.instrumentName="" 
            \context Staff = StaffSol \with { \remove "Time_signature_engraver" } << 
                \context Voice = ClaveSol \ClaveSol
            >>
            \context Staff = StaffFa \with { \remove "Time_signature_engraver" } << 
                \context Voice = ClaveFa \ClaveFa
            >>
        >>
  >>
  \layout { }
}