Railway carriage proceeds with many sorts of freight (7)
I believe the answer is:
cargoes
'many sorts of freight' is the definition.
I can't tell whether this defines the answer.
'railway carriage proceeds' is the wordplay.
'railway carriage' becomes 'car' (car can mean a train carriage).
'proceeds' becomes 'goes' ('go' can be a synonym of 'proceed').
'car'+'goes'='CARGOES'
'with' is the link.
Can you help me to learn more?
(Other definitions for cargoes that I've seen before include "Ships' loads" , "Carried loads" .)