Negligible snub (6)
I believe the answer is:
slight
I believe this clue is a double definition.
'negligible' is the first definition.
(thesaurus)
'snub' is the second definition.
(thesaurus)
(Other definitions for slight that I've seen before include "Inconsiderable - insult" , "Redeemer" , "Insult - not important!" , "Barely perceptible" , "Slender; rebuff" .)