Condemned a man's oil painting (4,4)
I believe the answer is:
mona lisa
'painting' is the definition.
(I've seen this before)
'condemned a man's oil' is the wordplay.
'condemned' indicates an anagram.
'a'+'mans'+'oil'='amansoil'
'amansoil' with letters rearranged gives 'MONA LISA'.
(Other definitions for mona lisa that I've seen before include "Da Vinci's famous painting of an enigmatic woman" , "Leonardo da Vinci's painting of enigmatic woman" , "depicted, in the Louvre" , "Da Vinci painting" , "Louvre painting" .)