Snake's sound (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">snake's sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for hiss that I've seen before include "Audio interference" , "Sharp sound of disapproval" , "Sound of serpent" , "Urgently whisper" , "Sound of escaping gas" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">snake's sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>