Frozen water (3)

I believe the answer is:
ice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">frozen water</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 ice that I've seen before include "kill American" , "Frozen liquid" , "Cubes in a drink" , "If it's thin, skating on it can be dangerous" , "Decorate a cake" .)