P.S. After hitting “send,” it occurred to me that the code I sent would not account music after a new system starts. The clef would appear incorrectly placed. I amended the code as below, and in this version, I tweaked the Scheme code setting so that the two clefs would not collide in the new system. It makes the bifurcated staffs have more distance, which I am very sure you can tweak as you like - - - Yoshi
%%% CODE BEGINS %%% \version "2.24.4" \new Staff = "main" { c''1 d'' e'' f'' \stopStaff \override Staff.StaffSymbol.line-positions = #'(-9 -7 -5 -3 -1) \set Staff.clefPosition = -7 \set Staff.middleCPosition = -11 \once \override Staff.Clef.stencil = ##f \startStaff << { \repeat unfold 4 {c''1 d'' e'' f''} } \new Staff \with { \remove Time_signature_engraver alignAboveContext = "main" \magnifyStaff #2/3 \override VerticalAxisGroup.default-staff-staff-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0) (stretchability . 10)) firstClef = ##f } { \repeat unfold 4 {c''2 c''2 d'' d'' e'' e'' f'' f'' }} >> } %%% END %%%