Dressed down in price, wearing sack (7)
I believe the answer is:
berated
'dressed down' is the definition.
('berate' can be a synonym of 'dress down')
'price wearing sack' is the wordplay.
'price' becomes 'rate' (I've seen this in other clues).
'wearing' indicates putting letters inside.
'sack' becomes 'bed' ('in the sack' means 'in bed').
'rate' going inside 'bed' is 'BERATED'.
'in' is the link.
(Other definitions for berated that I've seen before include "Scolded" , "Dressed down" .)