Relevance of demeanour? (7)
I believe the answer is:
bearing
I believe this clue is a double definition.
'relevance' is the first definition.
(bearing is a kind of relevance)
'demeanour?' is the second definition.
(bearing is a kind of demeanour)
'of' is the link.
(Other definitions for bearing that I've seen before include "Small sphere" , "supplied by Air Traffic Control" , "Way of standing" , "Attitude - pivot - reference" , "Compass point" .)