Unexpected blows (5)
I believe the answer is:
gusts
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unexpected blows</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 gusts that I've seen before include "Sudden blasts of wind" , "Bursts of strong wind" , "Blows (of wind)" .)