Transported to the north, tough delinquent is taken away (9)
I believe the answer is:
'is taken away' is the definition.
(I've seen this before)
'transported to the north tough delinquent' is the wordplay.
'transported' becomes 'carted' (carting is a kind of transporting).
'to the north' shows that the letters should be reversed in order (in a down clue, letters go up or 'northward').
'tough delinquent' becomes 'Ted' (member of the Teddy Boy subculture).
'carted' back-to-front is 'detrac'.
(Other definitions for detracted that I've seen before include "Took away" , "taken away" , "Diminished worth" .)