Shut up about our bravery (7)
I believe the answer is:
courage
'bravery' is the definition.
(I know that bravery can be written as courage)
'shut up about our' is the wordplay.
'shut up' becomes 'cage' (I've seen this in other clues).
'about' is an insertion indicator.
'cage' enclosing 'our' is 'COURAGE'.
(Other definitions for courage that I've seen before include "Valour" , "Grit" , "Bravery, heroism" , "Gallantry" , "See 6" .)