Rough-mannered (5)
I believe the answer is:
gruff
'rough-mannered' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gruff that I've seen before include "Abrupt in sound or manner" , "Rough-sounding" , "Surly -- rough-spoken" , "(Of voice) rough, low" , "Rasping - ungracious" .)