Crossword clues for the word: BSO The word BSO has appeared as an answer to at least 12 crossword clues on different crossword puzzles. Crossword clues for BSO Showing 1 to 12 of 12 results Clue(s) Arthur Fiedler's music gp. Beantown music grp. once led by Arthur Fiedler Beantown music org. Freq. performer at Tanglewood Grp. once headed by Seiji Ozawa Hatch Shell band Musical gp. that performs summer programs at Tanglewood Ozawa's gp. Ozawa's longtime org. Seiji Ozawa led it for nearly 30 yrs. Tanglewood letters Tanglewood org.