I have had this problem for about a month now whilst waiting for an appointment at my local dealer (Next Week). I have previously posted on another thread with a link to a video. Whilst I've been waiting I've made another video. This time I jacked up the car and turned the wheel by hand the "clank" appears to occur at the same point in the rotation of the rear wheel, after a number of rotations the point moves slightly forward.
I'm thinking this may be a broken bearing. The belt is free of stones and so are the teeth. I'm rather disappointed now the nice weather has arrived I can't drive it.
Hope this helps to identify your problem
https://identifying.be/sl4M5dr6Eac