Cold and unfriendly (6)
I believe the answer is:
frosty
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cold and unfriendly</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 frosty that I've seen before include "Lacking in warmth" , "showing little enthusiasm" , "Chilly in attitude, like musical snowman" , "Cold and unfriendly (glance or reception?)" , "Icy cold" .)