Painting by eccentric Somalian (4,4)
I believe the answer is:
mona lisa
'painting' is the definition.
(I've seen this before)
'eccentric somalian' is the wordplay.
'eccentric' indicates an anagram.
'somalian' is an anagram of 'MONA LISA'.
'by' is the link.
(Other definitions for mona lisa that I've seen before include "depicted, in the Louvre" , "Da Vinci's famous painting of an enigmatic woman" , "Leonardo da Vinci's enigmatic portrait" , "Famous painting of enigmatic woman by de Vinci" , "Louvre painting" .)