Property seller (6,5)
I believe the answer is:
estate agent
'property seller' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for estate agent that I've seen before include "Someone who arranges the buying and selling of property for clients" , "House seller" , "Property seller" , "Property dealer" , "Intermediary in the sale or rental of property" .)