Businessman who’d have you believe he works for the railway (8)
I believe the answer is:
importer
'businessman' is the definition.
(I know that importer is a type of businessman)
'who'd have you believe he works for the railway' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'porter' and 'porter' is located in the answer.
The remaining letters 'im' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for importer that I've seen before include "A trader in foreign goods" , "One who brings in" , "One buys in" , "Foreign dealer" , "One bringing in goods to country" .)