Produces central witnesses in cases (7)
I believe the answer is:
creates
'produces' is the definition.
(I've seen this in another clue)
'central witnesses in cases' is the wordplay.
'central witnesses' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'in' is an insertion indicator.
'cases' becomes 'crates' (crating is a kind of casing).
'e' going inside 'crates' is 'CREATES'.
Can you help me to learn more?
(Other definitions for creates that I've seen before include "Makes" , "Complains" , "Generates" , "Produces" , "Brings into existence" .)