Crossword Genius

An Aberdonian perhaps in Berkshire location (5)

Ross

I believe the answer is:

ascot

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'in berkshire location' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'an aberdonian' is the wordplay.
'an' becomes 'a'.
'aberdonian' becomes 'scot' (I've seen this in another clue).
'a'+'scot'='ASCOT'

'perhaps' acts as a link.

Can you help me to learn more?

(Other definitions for ascot that I've seen before include "English course" , "Berkshire town, famous for horse racing" , "Royal race meeting venue" , "Necktie with wide square ends" , "Where ladies wear new hats" .)

I've seen this clue in The Telegraph.
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