Russian vehicle (6)
I believe the answer is:
troika
'russian vehicle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for troika that I've seen before include "Three-horse sleigh" , "Russian carriage pulled by three horses abreast" , "Russian vehicle pulled by three horses" , "cart" , "Russian horse-drawn vehicle" .)