Chap in Reno, excitedly refers to place notorious for storms (4,4)

I believe the answer is:

cape horn

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

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

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(Other definitions for cape horn that I've seen before include "Notorious Chilean headland" , "Southern tip of South America" , "Head" , "Southernmost point of Chile" , "Southernmost point of South America" .)

I've seen this clue in The Irish Times.

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