Ski race over a winding course (6)
I believe the answer is:
slalom
'ski race over a winding course' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for slalom that I've seen before include "Winter Olympic event" , "Downhill ski race over a winding course" , "Downhill ski event" , "Downhill ski-race over a winding course" , "Skiers' obstacle race" .)