Lyrics Field vs. Lyricist

I am looking for Lyrics field to populate lyrics or other text; instead what I have under Extended fields list is the field Lyricist. I tried populating this, but this doesn't show up under lyrics in iTunes. Currently, I use another app called TagScanner to populate Lyrics field.

Is there a roadmap to provide this field; or is it already there and I am not able to find it?

The field is called UNSYNCEDLYRICS.