no it doesnt work that way. using an anti estrogen MAY help the problem but from my understanding the growth plate closure is caused more by hormonal fluctuation then hormone levels.
Either way, anti-estrogens or not, you are going to get hormonal fluctuation, and it is going to be significant. Also, many anti estrogens are tissue specific for anti estrogenic effect, and equally as powerful if not more powerful than normal estrogen in other tissues. you may end up taking an anti estrogen that is in fact causing even more growth plate closure.
again, if you use steroids as an adolescent, growth plate closure is unavoidable.