Unhearing (4)
I believe the answer is:
deaf
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unhearing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for deaf that I've seen before include "Rudely confident" , "With impaired hearing" , "Aurally challenged" , "like stone?" , "Not prepared to listen" .)