Present transport had his leg broken (6)
I believe the answer is:
sleigh
'present transport' is the definition.
(Santa's sleigh transports presents)
'his leg broken' is the wordplay.
'broken' indicates anagramming the letters.
'his'+'leg'='hisleg'
'hisleg' with letters rearranged gives 'SLEIGH'.
'had' acts as a link.
(Other definitions for sleigh that I've seen before include "Reindeer-pulled sledge" , "Horse-drawn sledge" , "Vehicle suitable for snow" , "Santa's vehicle" , "Carriage to run on snow" .)