Loud piercing cry (6)
I believe the answer is:
scream
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">loud piercing cry</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 scream that I've seen before include "Loud piercing cry" , "express horror" , "Call for" , "A shrill cry of fright" , "Howl, shriek" .)