Relieve (of) (3)
I believe the answer is:
rid
'relieve of' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rid that I've seen before include "Disabuse" , "Free, disencumber" , "Free, deliver, clear" , "Free, relieve" , "Throw off, unburden" .)