Racecourse some keep so meticulously (5)
I believe the answer is:
epsom
'racecourse' is the definition.
(Epsom is an English racecourse)
'some keep so meticulously' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'EPSOM' is hidden in the letters of 'keep so meticulously'.
(Other definitions for epsom that I've seen before include "Home to the Derby and the Oakes" , "Downs" , "place for racing" , "Mares would triumph here" , "English town, of course?" .)