An insult (7)
I believe the answer is:
affront
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">an insult</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for affront that I've seen before include "Snub" , "Insult to one's face" , "Offend the modesty or values of (someone)" , "Offend; offence" , "Rant off over insult" .)