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Vital amino acid: Abbr., 4 letters
An amino acid that is found in the central nervous system, 4 letters
Acts as an inhibitory neurotransmitter, 4 letters
Material for trousers, 9 letters
A firm durable fabric with a twill weave, 9 letters
(usually in the plural) trousers, 9 letters
Part of a twill suit, 15 letters
Suspected spy's fashionable garb, in Simon and Garfunkel's America, 13 letters