Renegade right to support crazed patriot wanting power (7)
I believe the answer is:
traitor
'renegade' is the definition.
(thesaurus)
'right to support crazed patriot wanting power' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to support' is a charade indicator (letters next to each other) (in a down clue, some letters hold others up).
'crazed' indicates anagramming the letters (I've seen this in other clues).
'wanting' is a deletion indicator (to want something can mean to lack it or need it).
'power' becomes 'p'.
'patriot' with 'p' taken away is 'atriot'.
'atriot' with letters rearranged gives 'traito'.
'r' put after 'traito' is 'TRAITOR'.
(Other definitions for traitor that I've seen before include "Double-crosser" , "Unreliable type" , "Disloyal person" , "Person betraying a cause" , "Judas" .)