Trivial insult (6)
I believe the answer is:
slight
This clue is a double definition.
'trivial' is the first definition.
(I've seen this before)
'insult' is the second definition.
(I've seen this before)
(Other definitions for slight that I've seen before include "of no great significance" , "Superficial" , "Trifling - snub" , "Minor -- snub" , "slap in the face" .)