Ruin — it lies west of here (4)

I believe the answer is:

dash

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This clue could be a double definition.

'ruin' is the first definition.
(thesaurus)

'it lies west of here' is the second definition.
The definition suggests a singular noun which matches the answer.

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(Other definitions for dash that I've seen before include "instrument panel" , "Striking" , "style" , "Splash of colour" , "Hyphen; race" .)

I've seen this clue in The Times.

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