Path one rebuilt for carriage (7)
I believe the answer is:
phaeton
'for carriage' is the definition.
(type of horse-drawn carriage)
'path one rebuilt' is the wordplay.
'rebuilt' indicates an anagram.
'path'+'one'='pathone'
'pathone' is an anagram of 'PHAETON'.
(Other definitions for phaeton that I've seen before include "transport" , "4-wheeled carriage" , "Coach" .)