Sudden strong wind or storm (6)
I believe the answer is:
squall
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">sudden strong wind</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">storm</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for squall that I've seen before include "Sudden storm of wind and rain, or a baby's cry" , "Short violent gust of wind and rain" , "Short-lived violent gust of wind and rain" , "Sudden strong wind" , "Brief violent storm" .)