A very nice puzzle, well up to Myops's tricky best.
But I'm stuck with 20D "Gumshoe" --T-Y (probably G-T-Y). The puzzle includes a large number of fictional detectives, and this looks like being an American one, but google/wiki searches reveal no such creature.
Thanks, Mamyalynne - I'm sure that's right. But which dictionary are you quoting? It's not Chambers (any edition) or Collins (basic version) or the Shorter OED or the full 1920-something OED or Webster's Third. Surely I don't need to go out and buy yet another ... ?
www.memidex.com/gutty+gym-shoe "gutty" (gym shoe) definition: a light gym shoe with a rubber sole and a canvas top. Synonyms: plimsol [Britain], plimsole [Britain], plimsoll...
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