UnScramble this Word: n g m s a i a?

Questions

sci fi authors: creator of the valentine series...?

clothes: eddie bauer, erehwon, and north face are these types of stores.?

clothes: 1990s slang for very short cutoff jeans.?

clothes: name of a clothing line, or sport whose periods are called 'chuckers'.?

clothes: three-letter clothing outlet, or a space or void.?