Rinse out once ascended (5)
I believe the answer is:
risen
'ascended' is the definition.
(rising is a kind of ascending)
'rinse out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'rinse' with letters rearranged gives 'RISEN'.
'once' is the link.
(Other definitions for risen that I've seen before include "Ascended - revolted" , "mounted a rebellion" , "Got up" , "Ascended - restored from death" , "Sprung up" .)