Out of line, in a way (5)
I believe the answer is:
sassy
'out of line in a way' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sassy that I've seen before include "(In US) saucy" , "Impertinent (US colloq.)" , "Pert" , "Cheeky American" , "Cheeky (US colloq.)" .)