Oils a man deployed in famous painting (4,4)
I believe the answer is:
mona lisa
'famous painting' is the definition.
(I've seen this before)
'oils a man deployed' is the wordplay.
'deployed' indicates anagramming the letters.
'oils'+'a'+'man'='oilsaman'
'oilsaman' anagrammed gives 'MONA LISA'.
'in' is the link.
(Other definitions for mona lisa that I've seen before include "Mysterious-smile Louvre portrait" , "depicted, in the Louvre" , "Da Vinci's famous painting of an enigmatic woman" , "Famous painting of enigmatic woman by de Vinci" , "Da Vinci painting" .)