Show embarrassment about paintings being traded away? (8)
I believe the answer is:
bartered
'traded away?' is the definition.
'show embarrassment about paintings' is the wordplay.
'show embarrassment' becomes 'be red'.
'about' is an insertion indicator.
'paintings' becomes 'art' (painting is a type of artwork).
'bered' enclosing 'art' is 'BARTERED'.
'being' acts as a link.
(Other definitions for bartered that I've seen before include "Exchange goods without involving money" , "Haggled over" , "Exchanged goods without involving money" , "The - Bride (Smetana opera)" .)