More brazen English underwear (9)
I believe the answer is:
brassiere
'underwear' is the definition.
'more brazen english' is the wordplay.
'more brazen' becomes 'brassier' ('brassy' can be a synonym of 'brazen').
'english' becomes 'E' (abbreviation as in OED).
'brassier'+'e'='BRASSIERE'
(Other definitions for brassiere that I've seen before include "garment" , "support" , "Female undergarment supporter" .)