CSS Clip Path is currently on the backlog with medium priority. The status can be tracked along with CSS Masking at https://developer.microsoft.com/en-us/microsoft-edge/platform/status/masks/
This work is now in Microsoft Edge Insiders Preview 17074 and higher.Dillan Simmons commented
This would be so nice. So much degradation / libraries / work arounds necessary for getting SVG animations to work in Edge!
This is on the backlog with a medium priority: http://dev.modern.ie/platform/status/masks