Dog transported in car (5)
I believe the answer is:
cairn
'dog' is the definition.
(cairn is a kind of dog)
'transported in car' is the wordplay.
'transported' indicates an anagram.
'in'+'car'='incar'
'incar' with letters rearranged gives 'CAIRN'.
(Other definitions for cairn that I've seen before include "Man" , "Heap of stones - terrier" , "Variety of 10" , "Stone-pile monument" , "Terrier - mound of stones" .)