Automatic runs on winter sports event (5)
I believe the answer is:
luger
'automatic' is the definition.
(I've seen this before)
'runs on winter sports event' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'on' is a charade indicator (letters next to each other).
'winter sports event' becomes 'luge'.
'r' after 'luge' is 'LUGER'.
(Other definitions for luger that I've seen before include "German semi-automatic pistol" , "She goes down rapidly" , "Make of pistol" , "competes in winter Olympics?" , "Type of (German) automatic pistol" .)