Sure, I can help you with that! Here are the steps to remove a file from the Recent Documents list in Excel 2007:

1. Open Excel 2007.
2. Click on the Office button in the top left corner of the screen.
3. Click on the Excel Options button at the bottom of the menu.
4. In the Excel Options window, click on the Advanced tab.
5. Scroll down to the Display section and find the option for "Show this number of Recent Documents".
6. Change the number to 0 (zero) and click OK.
7. Close Excel and reopen it.
8. Go back to the Excel Options window and change the number of Recent Documents back to the desired amount (e.g. 10).
9. Close Excel again and reopen it.
10. The list of Recent Documents should now be cleared and only show files that have been recently opened.

If you want to remove a specific file from the Recent Documents list without clearing the entire list, you can do the following:

1. Open Excel 2007.
2. Click on the Office button in the top left corner of the screen.
3. Find the file you want to remove from the Recent Documents list.
4. Right-click on the file and select "Remove from list".
5. The file should now be removed from the Recent Documents list.