Falsely accused by FBI man about crash (6)
I believe the answer is:
framed
'falsely accused' is the definition.
(I've seen this in another clue)
'fbi man about crash' is the wordplay.
'fbi man' becomes 'fed' (I've seen this in another clue).
'about' means one lot of letters goes inside another.
'crash' becomes 'ram' (synonyms).
'fed' placed around 'ram' is 'FRAMED'.
'by' is the link.
(Other definitions for framed that I've seen before include "Informally, convicted on false evidence" , "Enclosed" , "set up" , "Made to look guilty when innocent" , "Arranged false evidence against, like painting (6)" .)