Hi, yes agreed, anemonies a NO NO in young tanks, but may i suggest a compromise.
Clowns (common) are more than happy to nest in hammer corals, no problems. And it looks nice too. Hammers are also easier, so i always suggest that to people.
My 2 cents
the clowns will be happy but i doubt that the hammer coral will like this kinda thing,i would rather not do this.