Plosive speech sound (7,4)
I believe the answer is:
glottal stop
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">plosive speech sound</span>' is the definition.<br/ ><span class="explanation-format__explanation">(glottal stop is a kind of plosive speech sound)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for glottal stop that I've seen before include "Sound of mild explosion" , "Consonant sound in some languages" , "(In German) speech sound at start of some vowels" , "Phoneme of some languages (eg, Arabic)" , "Part of Cockney's speech" .)