Frozen spike (6)
I believe the answer is:
icicle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">frozen spike</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 icicle that I've seen before include "Cold hanger" , "Hanging piece of frozen water" , "point of cold water" , "Hanging drop of cold water" , "Frozen finger of liquid" .)