Crossword Genius

A Caledonian race venue? (5)

Ross

I believe the answer is:

ascot

I'm a little stuck... Click here to teach me more about this clue!

'race venue?' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'a caledonian' is the wordplay.
'caledonian' becomes 'scot' (I've seen this before).
'a'+'scot'='ASCOT'

Can you help me to learn more?

(Other definitions for ascot that I've seen before include "English horse racing venue on coast" , "Berkshire town, famous for horse racing" , "Tosca (anag) - racecourse" , "sporting venue" , "Fungus affecting wood" .)

I've seen this clue in the Evening Standard.
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