It's dark outside now and would mean taking off the wheel...Any chance of posting up a photo of the part?
Just a thought but...give your nearest dealership a call on monday and see if they have a part listed for the clip ?
if not then its a replacement hub.
Me too, that's why I came here!!what was outcome, having same problem
Used Silicon on mine, when it wouldn't stay in after bearing change. Clear is best, not so obvious to MOT man.Done a quick fix on mine to get it through its MOT, used a little bit of epoxy resin to hold it in place. Think some good glue or a little bit of silicon would work as well. Bad design.