Did a bit of browsing and found I would need Tasker for this, and that's where I stopped since its a lot to take in.
Edit - After more browsing it seems I didn't actually need tasker. So instead Ill ask for help on how to hide an entire widget only when I have 1+ missed calls and hide when I have none. Didn't know about the advanced parameter section.
Edit - At the moment I'm using a " $#SUSMS#<1?[oy]999[/oy]$ " to "hide" at the moment. Is there a better way to hide widgets than this? I need to still.be able to widget click them when hidden.