Motorcycling event (8)
I believe the answer is:
scramble
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">motorcycling event</span>' is the definition.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for scramble that I've seen before include "Muddle up" , "Motorbike rally" , "Disorderly rush" , "keep communication secret" , "Jockey for position" .)