Surrey town (5)
I believe the answer is:
epsom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">surrey town</span>' is the definition.<br/ ><span class="explanation-format__explanation">(town in Surrey)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for epsom that I've seen before include "Derby town" , "- Salts are a purgative" , "Derby race track" , "Surrey racecourse" , "Classic venue" .)