Flaunt trade name? Sort of (8)
I believe the answer is:
brandish
'flaunt' is the definition.
(I've seen this before)
'trade name? sort of' is the wordplay.
'trade name?' becomes 'brand' ('brand' can be a synonym of 'trade name').
'sort of' becomes 'ish' (eg 'amateurish' means somewhat amateur).
'brand'+'ish'='BRANDISH'
(Other definitions for brandish that I've seen before include "shake" , "Exhibit aggressively" , "Wave vigorously" , "Wave like a weapon" , "Wield (weapon)" .)