Rumour of butcher's transport (6)
I believe the answer is:
sleigh
'transport' is the definition.
(sleigh is a kind of transport)
'rumour of butcher's' is the wordplay.
'rumour of' shows a homophone (sound like).
'butcher' becomes 'slay' (I've seen this before).
'slay' is a homophone of 'SLEIGH'.
(Other definitions for sleigh that I've seen before include "Transport in winter" , "13 ac's transport" , "Horse-drawn sledge" , "Vehicle with runners; sounds like" , "ice, you say, in the Rockies?" .)