Nope.
I am making the clip offline in FCP first, deleting the clip in question from the disk. I’m also duplicating the entry in the render queue in AE so that the file is going to the exact same location with the exact same settings. It’s not a filename issue. When I choose open in editor in FCP from the right-click menu, it opens the correct clip in Quicktime with changes intact, changes that are not reflected in FCP.
The behavior is just like a web browser that displays the cached image after the image has been updated. With a browser, you can force it to do a refresh, but so far I have not found anything comparable in FCP except to restart the program, and occasionally the computer.