Free of suspicion, hence trial collapsed (2,3,5)
I believe the answer is:
in the clear
'free of suspicion' is the definition.
(I've seen this before)
'hence trial collapsed' is the wordplay.
'collapsed' is an anagram indicator.
'hence'+'trial'='hencetrial'
'hencetrial' anagrammed gives 'IN THE CLEAR'.
(Other definitions for in the clear that I've seen before include "out of the wood" , "out of a difficulty" , "No longer under suspicion" , "No longer in danger or suspected of something" , "got off Scot-free!" .)