Cost price (7)
I believe the answer is:
expense
I believe this clue is a double definition.
'cost' is the first definition.
(the cost or price of something)
'price' is the second definition.
(thesaurus)
(Other definitions for expense that I've seen before include "Money spent in the course of work" , "Disbursal" , "Outlay or cost" , "Disbursement" , "Charge" .)