Spooner's apostle's train makes scheduled stop (4,2,4)
I believe the answer is:
port of call
'stop' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Maybe you can see a link between them that I don't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for port of call that I've seen before include "place to stop en route" , "Place briefly visited" .)