n. 25B6; noun
the sale was arranged through an agent : REPRESENTATIVE, emissary, envoy, go-between, proxy, negotiator, broker, spokesperson, spokesman, spokeswoman; informal rep.
a travel agent : AGENCY, business, organization, company, firm, bureau.
a CIA agent : SPY, secret agent, undercover agent, operative, fifth columnist, mole, Mata Hari; N. Amer. informal spook, G-man; archaic intelligencer.
the agents of destruction : PERFORMER, author, executor, perpetrator, producer, instrument, catalyst.
a cleansing agent : MEDIUM, means, instrument, vehicle.