Uh. Nope. Not super simple. That's pretty much a weird one. If you do need to have your system set up to display that way (not sure why you're sending the actual canvas to the external) then you might want to learn to use the f9, f10, and f11 keys.
You need to go to system preferences and disable then in the 'expose' section.
System preferences > Dashboard and Expose > change any keys that say f9 f10 or f11 to '-', or choose other keys if you want to keep the functionality in the finder.
Then in FCP mark your in and out in the viewer, then hit f10 to overwrite to the timeline wherever the playhead is. f9 is insert and f11 is replace.