Top player (7)
I believe the answer is:
hotshot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">top player</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 hotshot that I've seen before include "Important person" , "Showily successful person" , "successful type?" , "Top player" , "ace" .)