Red machines damaged goods (11)
I believe the answer is:
merchandise
'goods' is the definition.
(merchandise is a kind of goods)
'red machines damaged' is the wordplay.
'damaged' indicates anagramming the letters.
'red'+'machines'='redmachines'
'redmachines' with letters rearranged gives 'MERCHANDISE'.
(Other definitions for merchandise that I've seen before include "traffic" , "Goods for trading" , "Trade" , "Items for sale" , "Goods for sale" .)