Former railway employee is one sending goods out (8)
I believe the answer is:
exporter
'one sending goods out' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'former railway employee' is the wordplay.
'former' becomes 'ex' (prefix meaning former or onetime).
'railway employee' becomes 'porter'.
'ex'+'porter'='EXPORTER'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for exporter that I've seen before include "trading abroad" , "one selling overseas" , "One sending goods abroad" , "One selling abroad" , "One making foreign sales" .)