Addict taken in because reoffending (4)
I believe the answer is:
user
'addict' is the definition.
(drug user)
'in because reoffending' is the wordplay.
'in' says the answer is hidden in the clue.
'USER' can be found hidden inside 'because reoffending'.
'taken' is the link.
(Other definitions for user that I've seen before include "Ruse (anag.)" , "One who works an appliance" , "One taking drugs" , "Drug taker" , "Manipulator" .)