Bridge player
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bridge player</span>' is the definition.<br/ ><span class="explanation-format__explanation">(name given to one player in the card game bridge)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for east that I've seen before include "playing partner" , "Where the sun rises" , "Bridge player" , "English region" , "Bidder after North (bridge)" .)