Uncivil, disrespectful (4)
I believe the answer is:
rude
This clue is a double definition.
'uncivil' is the first definition.
(synonyms)
'disrespectful' is the second definition.
(I've seen this in another clue)
(Other definitions for rude that I've seen before include "Impolite or coarse" , "Ill-mannered and coarse" , "Primitive; impolite" , "Base" , "so curt here?" .)