Disencumbered (3)
I believe the answer is:
'disencumbered' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rid that I've seen before include "Lose, shake off" , "Free (person of affliction)" , "Disabuse" , "Free, deliver, clear" , "Free (someone of something unwanted)" .)