Truth about crime finally comes to view (5)
I believe the answer is:
facet
'to view' is the definition.
(I've seen this in other clues)
'truth about crime finally' is the wordplay.
'truth' becomes 'fact' (true facts).
'about' means one lot of letters goes inside another.
'finally' suggests the final letters.
The last letter of 'crime' is 'e'.
'fact' enclosing 'e' is 'FACET'.
'comes' is the link.
(Other definitions for facet that I've seen before include "view" , "Side of a cut gem" , "Side or surface, diamond or building" , "Distinct feature" , "Flat surface on a cut gem" .)