Mock trial, if CIA involved (10)
I believe the answer is:
artificial
'mock' is the definition.
(thesaurus)
'trial if cia involved' is the wordplay.
'involved' indicates an anagram (involved can mean confusing or complex).
'trial'+'if'+'cia'='trialifcia'
'trialifcia' with letters rearranged gives 'ARTIFICIAL'.
(Other definitions for artificial that I've seen before include "Kiss of life" , "Bogus" , "Assumed" , "Contrived, false" .)