Vehicle transported to ark going round island (6)
I believe the answer is:
troika
'vehicle' is the definition.
(troika is a kind of vehicle)
'transported to ark going round island' is the wordplay.
'transported' indicates an anagram.
'going round' indicates putting letters inside.
'island' becomes 'i'.
'to'+'ark'='toark'
'toark' with letters rearranged gives 'troka'.
'troka' going around 'i' is 'TROIKA'.
(Other definitions for troika that I've seen before include "Russian carriage pulled by three horses abreast" , "Russian three-horse coach" , "Three-horse Russian vehicle" , "Russian three-horse carriage" , "cart" .)