Team making comeback in Nagasaki or Tokyo (6)
I believe the answer is:
troika
'team' is the definition.
(I have seen 'Team of three ' mean 'troika' so perhaps 'team' could also mean 'troika')
'comeback in nagasaki or tokyo' is the wordplay.
'comeback' says the letters should be written backwards.
'in' says the answer is hidden in the clue.
'akiort' can be found hidden inside 'nagasaki or tokyo'.
'akiort' back-to-front is 'TROIKA'.
'making' acts as a link.
(Other definitions for troika that I've seen before include "Russian carriage pulled by three horses abreast" , "Team of three" , "Russian three-horse carriage" , "Russian conveyance" , "Russian three-horse coach" .)