How can I delete a tie to a cue note?
I don’t think this is possible (I’m assuming you want a cue that begins midway through a tied note).
I just tested this: you could add a staff to an existing instrument, add the material, suppress playback, and then remove the staff. In Engrave mode you can then drag the slur to your liking.
You could also just use a dummy instrument for the same purpose? I guess it depends on how often you want to have random cues such as that. I do this for big band hits that a drummer might want to see.
