Part of train bearing Victoria or Gladstone, say (8)
I believe this is a quadruple definition!!
'part of train' is the first definition.
'bearing' is the second definition.
(someone's stance or posture)
'victoria' is the third definition.
(type of horse-drawn carriage)
'or' acts as a link.
'gladstone say' is the fourth definition.
(type of Victorian carriage)
(Other definitions for carriage that I've seen before include "Railway vehicle", "Comportment", "Railcar or horse-drawn vehicle", "Posture or train compartment", "Perhaps a smoker's".)