Report of murder in vehicle (6)
I believe the answer is:
sleigh
'vehicle' is the definition.
(sleigh is a kind of vehicle)
'report of murder' is the wordplay.
'report of' shows a homophone (sound like).
'murder' becomes 'slay' (synonyms).
'slay' is a homophone of 'SLEIGH'.
'in' is the link.
(Other definitions for sleigh that I've seen before include "Transport in winter" , "Reindeer-pulled sledge" , "Dancer pulled this" , "Horse-drawn sledge" , "transport (with bells on!)" .)