Gaffer Tape said:As for what his clothes meant, I do recall reading a quote somewhere from Mark Hamill that said that George showed him that costume stating that it was representative of the Jedi garb of old.
I think the quote could be in regards to Lucas' comment to Hamill at his costume fitting "It's actually quite similar to your outfit from the first film.Just a black version that's a little bit more Jedi like."