Shiner (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">shiner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for black eye that I've seen before include "Shiner" , "Kind of bruise - kind of bean" , "Key cable (anag)" , "mouse" , "Result of facial blow" .)