Ice hockey disc (4)
I believe the answer is:
puck
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ice hockey disc</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 puck that I've seen before include "Oberon's sprite (AMND)" , "Disc used in ice-hockey" , "gets knocked about with sticks" , "something a bit like a mouse" , "One of 5 [FAIRIES]" .)