Crossword Genius

Broad track running along the south side of Hyde Park in London (6,3)

Ross

I believe the answer is:

rotten row

(Other definitions for rotten row that I've seen before include "Capital place for riding" , "Part of London park" , "Horses here" , "Where to see riders" , "making foul noise?" .)

I've seen this clue in The Independent.
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