A summary of prices (6)
I believe the answer is:
precis
'a summary' is the definition.
(I know that precis is a type of summary)
'of prices' is the wordplay.
'of' indicates anagramming the letters (the answer comes from or 'of' the letters).
'prices' with letters rearranged gives 'PRECIS'.
(Other definitions for precis that I've seen before include "Summary, short version" , "Abstract; make summary (of text)" , "Summarize" , "Prices for abbreviated version" , "Summary of the main points" .)