A northerner's course (5)

I believe the answer is:

ascot

'course' is the definition.
(Ascot is a racecourse)

'a northerner's' is the wordplay.
'northerner' becomes 'scot' (someone from Scotland).
'a'+'scot'='ASCOT'

(Other definitions for ascot that I've seen before include "Place for meeting" , "Posh racecourse" , "Tie or cravat" , "Racecourse and cravat" , "Famous racecourse" .)

I've seen this clue in The Independent.

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