I'm pretty sure that's not the throwout bearing retaining clip. It's missing a couple bends to secure it and that one looks too thick. Perhaps something next to it for size reference would help.
I'm amazed at how unsure I am about that considering how many times I've pulled the trans out of my car. I guess it's been awhile since I last dropped the trans out of 1051. It's amazing how little work you have to do on these cars when not running at the strip. /ubbthreads/images/graemlins/rofl.gif