Reversed (6-3)
'reversed' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for inside-out that I've seen before include "US edition (anag.)" , "Thoroughly" .)
(Other definitions for backed that I've seen before include "Bet on or offered support" , "Put money on" , "Gave support" , "Placed a bet on" , "Supported; reversed" .)
'reversed' is the definition.
(undoing is a kind of reversing)
This is all the clue.
(Other definitions for undid that I've seen before include "Disentangled" , "Reversed, destroyed" , "Cancelled - destroyed" , "Unbuttoned" , "Annulled; unfastened" .)