Crossword clues for the word: NSO The word NSO has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for NSO Showing 1 to 7 of 7 results Clue(s) Admiral's aide: Abbr. High-ranking sailor L. Slatkin's group Naval title: Abbr. Navy aide: Abbr. Navy person: Abbr. Officer in the Navy: Abbr.