Try this:
!NoteWorthyComposerClip(2.751,Single)
|Instrument|Name:"Clarinet"|Patch:71|Trans:0|DynVel:10,30,45,60,75,92,108,127|Pos:8
|Clef|Type:Treble
|Key|Signature:C|Tonic:C
|TimeSig|Signature:Common
|MPC|Controller:exp|Style:Linear Sweep|TimeRes:Quarter|SweepRes:5|Pt1:1,64|Pt2:3,127|Pos:8|Placement:AtNextNote
|RestChord|Dur:4th|Opts:Stem=Down,ArticulationsOnStem,HideRest|Dur2:Whole|Pos2:1
|Note|Dur:Half,Dotted|Pos:1z|Opts:Crescendo,StemLength=0,Muted,XDotSpace=-1
!NoteWorthyComposerClip-End
The main point is the Rest Chord (rest hidden) followed by a muted headless stemless note holding the crescendo marking over the required duration.
To achieve the proper sound needs an MPC (Expression).
To get rid of the Dot on the second note make its extra spacing negative.