First of all there's three musicians you have to rescue ^^ I think you get the garment grid at a later chapter and Clasko only disembarks on Chapter 3, go to the monster arena and if he isn;t there all freaked out outside of the Arena, then you missed something.

here's the site's quick FAQ on the walkthrough:

http://www.eyesonff.com/ff10-2/walk1.shtml