Spear of frozen water (6)
I believe the answer is:
icicle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">spear of frozen water</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 icicle that I've seen before include "Cold hanger" , "Tapering frozen water" , "Spear-like shape formed by the freezing of dripping water" , "Something hanging in winter" , "one hanging around in the cold" .)