Large -X directory

[Robert Fitzpatrick]

I have a directory, no idea where it came from called '-X' and it has
consumed my entire /home partition, now 10GB. Given the name, I am
finding it hard to remove, how can I remove this file? I've been doing a
lot of backup script testing on that devel server, so I am assuming it
came from a bad run at this point with the -X option of tar placed
incorrectly.

-- 
Robert