Sea mist (4)
I believe the answer is:
haar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sea mist</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 haar that I've seen before include "Sea mist" , "Raw sea-mist" , "East-coast sea fog" , "chilly sea-mist" , "Sea-fog" .)