Boat race (7)
I believe the answer is:
regatta
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">boat race</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for regatta that I've seen before include "Number of yachts in sporting event" , "Sporting event with boat or yacht races" , "Sports event" , "Meeting at Dartmouth, perhaps" , "event at the seaside" .)