Well-bred (7)
I believe the answer is:
genteel
'well-bred' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for genteel that I've seen before include "Courtly, cultivated" , "Affectedly refined and upper-crust" , "Polite and well-bred" , "Exaggeratedly polite" , "Cultured; polite" .)