Attendance; impressive bearing (8)
I believe the answer is:
presence
This clue is a double definition.
'attendance' is the first definition.
(I know that presence is a type of attendance)
'impressive bearing' is the second definition.
(I've seen this before)
(Other definitions for presence that I've seen before include "Charisma; mien" , "Aura; nearness" , "Personal appearance, aura" , "Bearing, comportment" , "Impressive bearing" .)