Stitched up FBI man probed by force (6)
I believe the answer is:
framed
'stitched up' is the definition.
(I've seen this before)
'fbi man probed by force' is the wordplay.
'fbi man' becomes 'fed' (I've seen this in another clue).
'probed by' indicates putting letters inside (probe can mean to poke into something).
'force' becomes 'ram' (synonyms).
'fed' going around 'ram' is 'FRAMED'.
(Other definitions for framed that I've seen before include "Enclosed" , "Falsely incriminated" , "Informally, convicted on false evidence" , "Maybe like a photo" , "Arranged false evidence against, like painting (6)" .)