Vessel from Victoria or Tasmania (5)
I believe the answer is:
aorta
'vessel' is the definition.
(blood vessel)
'from victoria or tasmania' is the wordplay.
'from' indicates a hidden word.
'AORTA' is hidden in the letters of 'victoria or tasmania'.
(Other definitions for aorta that I've seen before include "Trunk route" , "Main artery from heart" , "claret supplier" , "Major artery at left of heart" , "vital transporter" .)