Delacroix shows some European DNA (6)
I believe the answer is:
eugene
'delacroix' is the definition.
(French artist Eugne Delacroix, 1798-1863)
'some european dna' is the wordplay.
'some european' becomes 'EU' (European Union).
'dna' becomes 'gene' (genes are made up of DNA).
'eu'+'gene'='EUGENE'
'shows' is the link.
(Other definitions for eugene that I've seen before include "- Onegin (Pushkin)" , "- - Onedin" , "Great American playwright . . . . . . O'Neill" , "opera, but only first half" , ". . . . . . Onegin (Tchaikovsky) (6)" .)