Shifty trader is more satisfied to bypass rail terminal (8)
I believe the answer is:
smuggler
'shifty trader' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for smuggler that I've seen before include "Runner" , "One who imports or exports without paying duties" , "Illegal importer" , "Transporter of illegal goods" , "Exciseman's foe" .)