Your clarkii sounds like my tomato clown,she bites me everytime i put my hand in my tank.I have been thinking about giving her and her mate their own tank as well.
As far as breeding,from what i've read,you'll need to setup a smal rearing tank so you'll be able to feed the fry rotifers.I havn't heard of anyone being able to raise them in a display setting although i'm sure there are exceptions.Most breeders encourage them to nest/lay eggs on a piece of tile or pottery so it can easily be removed to a tank to be hatched.A simple airline with a slow bubble count to gently provide circulation around the eggs is all that is needed.You'll need to start feeding the rotifers after the fry have absorbed their yolk sac(about 3 days).After they grow a bit,a small sponge filter can be used for filtration and waterchanges to maintain water quality during the whole process.The whole hatching/raising process can be quite an ordeal but probably worth it if your succesful.