Cost of moving goods vehicle (8)

I believe the answer is:

carriage

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'vehicle' is the definition.
(I know that carriage is a type of wheeled vehicle)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for carriage that I've seen before include "Railway passenger coach" , "Posture or train compartment" , "Posture; conveyance" , "Bearing - conveyance" , "Bodily posture or wheeled vehicle" .)

I've seen this clue in The Independent.

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