Russian vehicle brought back from Nagasaki or Tokyo (6)
I believe the answer is:
troika
'russian vehicle' is the definition.
(I've seen this before)
'back from nagasaki or tokyo' is the wordplay.
'back' says the letters should be written backwards.
'from' says the answer is hidden in the clue.
'akiort' is hidden within 'nagasaki or tokyo'.
'akiort' backwards is 'TROIKA'.
'brought' is the link.
(Other definitions for troika that I've seen before include "Russian vehicle drawn by three horses abreast" , "Russian three-horse carriage" , "Group of three" , "Threesome" , "Team of three" .)