Subversive type of bar to use criminally (8)
I believe the answer is:
saboteur
'subversive type' is the definition.
(saboteurs are subversive people)
'bar to use criminally' is the wordplay.
'criminally' is an anagram indicator (I've seen this in other clues).
'bar'+'to'+'use'='bartouse'
'bartouse' with letters rearranged gives 'SABOTEUR'.
'of' is the link.
(Other definitions for saboteur that I've seen before include "Our beats (anag) - fifth columnist" , "Abuser to become a kind of destroyer" , "Rebel" , "One who deliberately subverts" , "One causing deliberate destruction" .)