Sold education off (9)
I believe the answer is:
auctioned
'sold' is the definition.
(auctioning is a kind of selling)
'education off' is the wordplay.
'off' indicates an anagram.
'education' with letters rearranged gives 'AUCTIONED'.
(Other definitions for auctioned that I've seen before include "Hammered away" , "Disposed of lots" , "Sold to the highest bidder" , "Dealt with lots" , "Idea count (anag.)" .)