Cartel has acquired some Asian capital (5)
I believe the answer is:
lhasa
'asian capital' is the definition.
(I've seen this in another clue)
'cartel has acquired some' is the wordplay.
'some' indicates the answer is hidden within the clue.
'LHASA' is hidden within 'cartel has acquired'.
(Other definitions for lhasa that I've seen before include "Group; stripe" , "Tibetan dog breed" , "Asian capital" , "Luxembourg's a" , "Tibetan holy city" .)