New sex-trafficking rings? (5)
I believe the answer is:
extra
'new' is the definition.
(thesaurus)
'sex-trafficking rings?' is the wordplay.
'rings?' says the answer is hidden in the clue (in the sense of encircling/enclosing).
'EXTRA' is hidden within 'sex trafficking'.
(Other definitions for extra that I've seen before include "appearing in crowd scene" , "comes to 16 [TEST MATCH]" , "someone acting in a crowd" , "Accessory" , "Superfluous" .)