Negate (4)
'negate' is the definition.
(denying is a kind of negating)
This is the entire clue.
(Other definitions for deny that I've seen before include "Disown" , "Refuse to admit the truth" , "Declare untrue" , "Controvert" , "Disclaim" .)
'negate' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for undo that I've seen before include "Loosen; cancel" , "(4)" , "Release button, knot etc" , "Open buttons or ruin" , "Ruin or undermine" .)
'negate' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for cancel that I've seen before include "Strike out" , "Annul, revoke" , "Annul; negate" , "Officially prevent happening" , "Cross out or annul" .)