the clip is a retaining clip but I do not know if you can get one but maybe some one else might know or even go to a scrap yard and get one also my hp pump is leaking and it goes in on Monday as I am not to well the garage is going to get it professionally over hauled that will cost £200 and £80 for taking it of and putting it back but they are borrowing the special tools of me, but I do not mind it is a garage I know and can trust. I have been told they usually leak on the front , so that is why I have grease like all over the front end of the engine