You could also tie to a new [extra] note (that you don’t want) and then change the opacity of that particular fake note to 0%. I’ve used this fake to more precisely place glissando lines where I want them when dealing with chords. (In this case it would probably have to be a different pitch—a sharp or a flat of whatever you’ve already got—so that it isn’t absorbed into the tie chain.) The extra note merely serves as the anchor point for the line but doesn’t have to be shown itself.