Scottish racecourse (3)
I believe the answer is:
ayr
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">scottish racecourse</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(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" .)