Can confirm, the only Clarity spell shipped on the 1999 Yellow Disk was "Cassandra`s Chorus of Clarity"
[You must be logged in to view images. Log in or Register.]
The spell that later became Clarity was at index 174 as the spell "Ally", which added 400 faction. It was a direct upgrade to Benevolence.
That spell may not have been present on launch. though that info may have been lost to time:
[You must be logged in to view images. Log in or Register.]