I would say there is no worry about clawback.

IIRC - you are taking advantage of the 10x MR promotion by using AU. But AFAICT - the offer isn't requires AU or some sort. Because all AU spending counts to primary cardmember per T&Cs (i.e. financially liable). So cancel the AU will not erase the spending and does not alter the promotion.

But I agree with others wait if you can, given you should have billed and paid the AF for AU.