Formality in bearing and appearance (8)
I believe the answer is:
gravitas
'formality in bearing and appearance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for gravitas that I've seen before include "Solemnity of manner" , "Serious demeanour" , "Formal bearing" , "Weight" , "Seriousness of manner" .)