I read an article about this in TFM(tropical fish magazine). The jest of it was that the Africans will become territorial as they mature and they will protect there territory at all costs. So, people think everythings good to go when they first get the two together but then the AC's reach maturity and you may be very dissapointed. They didn't say it was impossible or shouldn't be done but they recommended a lg. tank with lenght being more important than depth. Also, plenty of hiding places.
I agree with the PH being ok for the Clowns although it is not preferable. I've maintained an 8.2 PH and my clowns have been perfectly happy.
I would say, if your going to go for it, get 2 or 3 more so they can have the social structure they thrive on.