Perceive sound (4)
I believe the answer is:
hear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">perceive sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hear that I've seen before include "Perceive by the auditory sense" , "Discover aurally" , "receive information" , "Perceive audibly" , "Get wind of" .)