Invent brand (4)
I believe the answer is:
make
This clue is a double definition.
'invent' is the first definition.
(I know this)
'brand' is the second definition.
(I know that brand can be written as make)
(Other definitions for make that I've seen before include "Create; a brand" , "Create, form" , "Appoint" , "Create or cause to happen" , "Keep the wolf from the door?" .)