Given most of our tank conditions I doubt they will grow as well as in the wild and prob nvr reach their max. wild size.
But from personal experience, I noticed that my clown seems to have the fastest growth rate as compared to my other fishes (tangs, angels, dotty etc)
Percula clowns r not too aggressive when compared to its other family members (Maroon, tomato etc)...however, they may attack ya resident clown if u have one.