Disobey (6)
I believe the answer is:
refuse
'disobey' is the definition.
(I know that disobey is a more specific form of the action refuse)
This is the entire clue.
(Other definitions for refuse that I've seen before include "Turn down - rubbish" , "Decline waste material" , "Reject the waste material" , "deadwood" , "Trash" .)