Fortune down to Dutch ancestry in part (6)
I believe the answer is:
chance
'fortune' is the definition.
(synonyms)
'dutch ancestry in part' is the wordplay.
'in part' indicates a hidden word.
'CHANCE' is hidden within 'dutch ancestry'.
'down to' acts as a link.
(Other definitions for chance that I've seen before include "he unpredictable element of life" , "Risk doing (something)" , "Risk the opportunity" , "Run a risk" , "Opportunity; random effect" .)