Impertinent sort (4)
'impertinent sort' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for snip that I've seen before include "Quick cut - something easily done" , "nick)" , "Easy to do - use pins" , "Cut; bargain (colloq.)" , "Cut - price bargain" .)
(Other definitions for snot that I've seen before include "Mucus" , "Dog" , "Contemptible type" .)