Rink surface (3)
I believe the answer is:
ice
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rink surface</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ice that I've seen before include "Glaciate" , "Frozen water - diamonds" , "If it's thin, skating on it can be dangerous" , "such an age" , "Diamonds, colloquially" .)