Specify "Viewable" area of a Movie Clip

Is it possible to specify the viewable area of a movie clip?

for example, lets say I have a Movie Clip whos area is 500 x 500

But I want to only be able to view it through a 100x100 “window”.

So the size aspect of the movie clip stays the same. And the only area that you can see is through the 100x100 window.

Also, i want the “window” to be stationary, and have the movie clip pan around behind it.

can this be done?