Cleanse totally (5)
I believe the answer is:
purge
'cleanse totally' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for purge that I've seen before include "Removal by cleansing" , "empty bowels" , "Thoroughly clean" , "Remove impurities from" , "Cleanse or eradicate." .)