High rent, amount that's something people contest (10)
I believe the answer is:
tournament
'that's something people contest' is the definition.
(people compete in tournaments)
'high rent amount' is the wordplay.
'high' indicates anagramming the letters (can mean drunk or on drugs and hence disordered).
'rent'+'amount'='rentamount'
'rentamount' anagrammed gives 'TOURNAMENT'.
(Other definitions for tournament that I've seen before include "Sports contest" , "series of games" , "Jousting competition" , "Medieval jousting event" , "meeting!" .)