\relative c' <<
  \new Staff = "1" { c4 c s2 }
  \new Staff = "2" { c4 c s2 }
  \new Staff = "3" { c4 c s2 }
  { \skip 2
    <<
      \lyrics {
        \set alignBelowContext = "1"
        lyrics4 below
      }
      \new Staff \with {
        alignAboveContext = "3"
        fontSize = -2
        \override StaffSymbol.staff-space = #(magstep -2)
        \remove "Time_signature_engraver"
      } {
        \tuplet 6/4 {
          \override TextScript.padding = 3
          c8[^"ossia above" d e d e f]
        }
      }
    >>
  }
>>

\paper {
  ragged-right = ##t
}