Land's End to support a railway (9)

I believe the answer is:

shoreline

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'land's end' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?

'support a railway' is the wordplay.
'support' becomes 'shore' (I've seen this before).
'a railway' becomes 'line' (line is a kind of railway).
'shore'+'line'='SHORELINE'

'to' is the link.

Can you help me to learn more?

(Other definitions for shoreline that I've seen before include "Land's edge" , "Meeting point of land and sea" , "Where the sea meets land" , "Coastal strip" .)

I've seen this clue in the Sydney Morning Herald.

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