Puff of wind (4)
I believe the answer is:
gust
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">puff of wind</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for gust that I've seen before include "A big blow" , "Puff (of wind)" , "Blast of air" , "Sudden rush of wind" , "Flurry" .)