Proceeds to fix set price (8)
I believe the answer is:
receipts
'proceeds' is the definition.
(thesaurus)
'fix set price' is the wordplay.
'fix' is an anagram indicator.
'set'+'price'='setprice'
'setprice' with letters rearranged gives 'RECEIPTS'.
'to' is the link.
(Other definitions for receipts that I've seen before include "Acknowledgments of payment" , "proceeds" , "Income, takings" , "Cooking instructions once" , "Acknowledgments of monies paid" .)