Scottish racecourse (3)
I believe the answer is:
ayr
'scottish racecourse' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ayr that I've seen before include "Scots port on Firth of Clyde" , "Scottish town, port and racecourse" , "Town on Firth of Clyde" , "Scottish salmon river" , "Scots. town; sounds like song" .)