Hi JohnnyMidrange,
Hm, it shows the pointer on my test. It is probably related to the theme...
Yeah, the cursor: pointer; part is right. I am not sure what class it would be under. Try it under .wpcf7-submit { and input[type="submit"] { and see if that works.
If not you can paste your website URL here and I can tell you would it would be.
Thanks,
Scott