How do I create a data frame buffer?

[BradSmith]

Is there a quick and easy way to create a buffer around a data frame? I have some data layers that are geographically much larger than the data frame, and I would like to clip them so that they are only slightly larger than the data frame.

[PanGIS]

My day at work has just finished.

I don't guarantee that my answer isn't an idiocy 

I would create a polygon as big as the data frame, then a buffer at x meters and use this to clip.....

[BradSmith]

Thank you for the reply. This is my fall back idea. I was just hoping that there is an easier way.