Classic horse race (2,5)
I believe the answer is:
st leger
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">classic horse race</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for st leger that I've seen before include "Annual horse race" , "Classic Doncaster horse race" , "Annual horse-race for 3-yearolds at Doncaster" , "Annual Doncaster race" , "fixture for the flat" .)