Job for a shipping company (4)
I believe the answer is:
line
'job' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for line that I've seen before include "Wrinkle, boundary" , "Row; track" , "It's long relative to its width" , "Railway track; wrinkle" , "business" .)