How do I render a sprite so the edges get cut off?

[goodnewsjim]

Lets say I have a 120x120 sprite, and I only want to render 60x60 of it in a boxed window then display on the stage.

I could probably hack up a solution, but what is the correct way to do this?

[goodnewsjim]

The only place I see this done is actually in the screen rendering size, stuff that is off the screen gets cut off.  How do I do this in a sprite in the middle of the screen without overlapping it with another sprite?         

[goodnewsjim]

Solution is found here: http://www.reddit.com/r/flash/comments/1tc69v/how_do_you_cut_a_sprite_off_like_it_was_rendering/