Lopsided contest (4)
I believe the answer is:
rout
'lopsided contest' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rout that I've seen before include "Overwhelmingly defeat" , "Whitewash" , "Utter defeat" , "Crushing defeat" , "Overwhelming defeat or disorderly retreat" .)