International yachting trophy (8,3)
I believe the answer is:
americas cup
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">international yachting trophy</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 americas cup that I've seen before include "International match between two sailing yachts, first held in 1851" , "International yachting trophy" , "main competition" , "Yachting prize" , "Yacht-racing trophy" .)