Similar to Lallans suggestion, I have heard tell of using activated charcoal and/or baking soda to remove odors. Just place an open container of the charcoal or baking soda in an enclosed space (a closet, sealed bag, drawer, etc.) with the garment having the offending odor for a couple of days.

Another suggestion I found for using baking soda (google "How to take smell out of clothes without washing"): "Put your musty clothes in a large plastic bag and sprinkle in some baking soda. Give the bag a good shake so the baking soda covers all of your clothes and then leave it to sit for 10 minutes. Then, remove your clothes, brush off the baking soda."

Best of luck.