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