Big blow (4)
I believe the answer is:
gale
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">big blow</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gale that I've seen before include "A wild storm" , "High wind" , "Squall" , "Force 8 wind" , "A storm of wind and rain" .)