Bob in the Olympics (4)
I believe the answer is:
sled
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bob in the olympics</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sled that I've seen before include "Goods vehicle" , "Sledge" , "American toboggan" , "Winter transport" , "Snow transport" .)