Criminal gang with computer technology (6)
I believe the answer is:
bandit
'criminal' is the definition.
(bandit is a kind of criminal)
'gang with computer technology' is the wordplay.
'gang' becomes 'band' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'computer technology' becomes 'it' (I've seen this in other clues).
'band'+'it'='BANDIT'
(Other definitions for bandit that I've seen before include "Dan bit the robber badly" , "Marauder" , "Desperado" , "Armed brigand" , "Crook" .)