A muted headless whole grace note can help !
!NoteWorthyComposerClip(2.5,Single)
|Clef|Type:Treble|OctaveShift:Octave Down
|Chord|Dur:16th,Triplet=First,Slur|Pos:b-1|Opts:Stem=Up,Beam=First|Dur2:Half|Pos2:-8,-3
|Note|Dur:Whole,Grace|Pos:10z|Opts:NoLegerLines,Muted
|Note|Dur:16th,Triplet,Slur|Pos:-2|Opts:Stem=Up,Beam
|Note|Dur:16th,Triplet=End|Pos:-1^|Opts:Stem=Up,Beam=End
|Note|Dur:4th,Dotted|Pos:-1|Opts:Stem=Up
|Chord|Dur:16th,Triplet=First,Slur|Pos:b-1|Opts:Stem=Up,Slur=Downward,Beam=First|Dur2:Half|Pos2:-8,-3
|Note|Dur:16th,Triplet,Slur|Pos:-2|Opts:Stem=Up,Slur=Downward,Beam
|Note|Dur:16th,Triplet=End|Pos:-1^|Opts:Stem=Up,Beam=End
|Note|Dur:4th,Dotted|Pos:-1|Opts:Stem=Up
!NoteWorthyComposerClip-End