middleman
mid‧dle‧man /ˈmɪdlmæn/
noun (plural middlemen /-men/) [countable]
someone who buys things in order to sell them to someone else, or who helps to arrange business deals for other people:
He acts as a middleman for British companies seeking contracts in the Gulf.
Buy direct from the manufacturer and cut out the middleman (=avoid using a middleman).
mid‧dle‧man /ˈmɪdlmæn/
noun (plural middlemen /-men/) [countable]someone who buys things in order to sell them to someone else, or who helps to arrange business deals for other people: