I strongly dispute this on three fronts
The ball was not won. The attacking player was and would have continued to be in control of the ball had she not been brought down, despite the defending touch.
The challenge on the ball can only ben clean if the attacking player is not 'brought down' (or in other words there is no material contact with oppoenet) Once the attacking player is brought down, it's not a clean tackle anymore.
I also dispute it being fair due to already explained reasons. But I agree that what's fair is a matter of opinion.
Edit; I may have missread your post "fairly cleanly"