Crossword Genius

Thoracic case? (5)

Ross

I believe the answer is:

chest

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'case?' is the definition.
(both are types of container)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for chest that I've seen before include "Strong box; thorax" , "drawers in it!" , "Part of body; storage box" , "Breast - case" , "Piece of furniture" .)

I've seen this clue in The Globe and Mail.
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