Broker's charge (3)
I believe the answer is:
fee
'broker's charge' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for fee that I've seen before include "price" , "Sum payable to, say, barrister" , "(Entry) charge" , "Sum payable to professional person for services" , "Payment to a professional for services" .)