Social conduct (7)
(Other definitions for bearing that I've seen before include "Giving birth" , "Demeanour - direction" , "Compass point" , "supplied by Air Traffic Control" , "Relevance, way of moving" .)
'social conduct' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for manners that I've seen before include "Politeness" , "Social conduct" , "Etiquette" , "Acceptable behaviour" , "people at station, perhaps" .)