Deliberate insult (7)
I believe the answer is:
affront
'deliberate insult' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for affront that I've seen before include "Offend; offence" , "Indignity" , "Snub" , "Offend the modesty or values of (someone)" , "Cause of outrage or offence" .)