Brand new moneymaking concern (4)
I believe the answer is:
mint
This clue is a double definition.
'brand new' is the first definition.
(I've seen this in other clues)
'moneymaking concern' is the second definition.
(I've seen this in another clue)
(Other definitions for mint that I've seen before include "A bomb" , "Place where metal money is made" , "and 18 Down: Southern US cocktail" , "Aromatic plant; as new" , "A tangy sweet or coin-making place" .)