Day out in Edinburgh spoilt after entry of old person from one's home town? (9)

I believe the answer is:

neighbour

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'day out' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?

I don't understand how the rest of the clue works.

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(Other definitions for neighbour that I've seen before include "Person who lives next door" , "Local resident" , "Someone in the street" , "One lives nearby" , "One lives near you" .)

I've seen this clue in The Independent.

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