Damage rogue state (6)
I believe the answer is:
impair
'damage' is the definition.
(impairing is a kind of damaging)
'rogue state' is the wordplay.
'rogue' becomes 'imp'.
'state' becomes 'air' (air is a kind of state**).
'imp'+'air'='IMPAIR'
(Other definitions for impair that I've seen before include "Damage or handicap" , "Courteous man (colloq.)" , "'Mar, spoil (6)'" , "Hobble" , "Hurt or handicap" .)