Crossword Genius

Thorax membrane (6)

Ross

I believe the answer is:

pleura

'thorax membrane' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for pleura that I've seen before include "The membrane surrounding the lungs" , "Membrane around lung" , "Membrane around the lungs" .)

I've seen this clue in The Times and The Sunday Times.
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