Membrane's wrecked by a puller (7)
I believe the answer is:
pleural
'membrane's' is the definition.
(I've seen this before)
'wrecked by a puller' is the wordplay.
'wrecked by' indicates an anagram.
'a'+'puller'='apuller'
'apuller' with letters rearranged gives 'PLEURAL'.
(Other definitions for pleural that I've seen before include "Like serous membrane" , "like serous membranes" , "With respect to an organ" , "Concerning this membrane" , "Relating to covering of lung" .)