The toboggan broke his leg (6)
I believe the answer is:
sleigh
'the toboggan' is the definition.
(I've seen this before)
'broke his leg' is the wordplay.
'broke' indicates anagramming the letters.
'his'+'leg'='hisleg'
'hisleg' is an anagram of 'SLEIGH'.
(Other definitions for sleigh that I've seen before include "Vehicle suitable for snow" , "Santa's transport" , "transport in snowbound area" , "vehicle drawn by reindeer" , "Transport in winter" .)