Mean to turn off the competition (10)
I believe the answer is:
tournament
'the competition' is the definition.
(tournament is a kind of competition)
'mean to turn off' is the wordplay.
'off' is an anagram indicator.
'mean'+'to'+'turn'='meantoturn'
'meantoturn' is an anagram of 'TOURNAMENT'.
(Other definitions for tournament that I've seen before include "Sports event" , "Jousting competition" , "pageant" , "Medieval jousting event" , "Jousting contest" .)