Evidence of trial meant to be translated (9)
I believe the answer is:
testament
'evidence' is the definition.
(I've seen this before)
'trial meant to be translated' is the wordplay.
'trial' becomes 'test' (synonyms).
'to be translated' is an anagram indicator.
'meant' with letters rearranged gives 'ament'.
'test'+'ament'='TESTAMENT'
'of' acts as a link.
(Other definitions for testament that I've seen before include "Biblical division" , "Tribute" , "Witness" , "Earnest" , "Will - covenant" .)