Yes, it makes sense. But, no, it's not possible. [EDIT: Yes, it is - see Broman's post below.] This plugin (which one is it, by the way?) has a parameter which is controlled by directly by CC01 messages, but does not appear in the list of VSTi parameters. Have I got that right? If so, then it it cannot be controlled from a VSTi parameter envelope, only by MIDI CC-01 messages, either from a MIDI Clip or from your keyboard (with the track Armed for Recording). Would it be any use to use the Inline MIDI Editor for the MIDI Clips, or two have two MIDI Clips on the track (in Free Item Positioning Mode) - one for the MIDI notes and one for MIDI CC-01)?
PS: Automation lanes for MIDI CC messages have been requested.