Caught in wind, setter's defective hearing (8)
I believe the answer is:
mistrial
'hearing' is the definition.
(I have seen 'Defective hearing ' mean 'mistrial' so perhaps 'hearing' could also mean 'mistrial')
'caught in wind setter's defective' is the wordplay.
'caught in' is an insertion indicator.
'wind' becomes 'mistral' (mistral is a kind of wind).
'setter's defective' becomes 'i' (I can't explain this - if you can you should give a lot more credence to this answer).
'mistral' placed around 'i' is 'MISTRIAL'.
Can you help me to learn more?
(Other definitions for mistrial that I've seen before include "Invalid court procedure" , "Defective hearing" , "Court proceedings gone wrong" , "Court procedure made void by error" , "Court case invalidated by procedural error" .)