Editor Log-In Through WordPress
WordPress allows you to specify a redirect in the URL.  So if you make this their "Log In" link:

https://example.org/wp-login.php?redirect_to=https%3A%2F%2Ftest.9to5.org%2Fwp-admin%2Fadmin.php%3Fpage%3DCiviCRM&amp;reauth=1

They'll drop into the CiviCRM dashboard upon successful login.  Replace example.org with your own URL, of course.