1) Afrikaans surname 2) BBQ offering 3) Chief Justice 4) Drive-in order, often 5) Fast food order 6) Fast food staple 7) Fast-food offering 8) Fast-food order 9) Fast-food staple 10) Frank alternative 11) German surname 12) He succeeded Warren 13) White wine grape variety Found on https://www.crosswordclues.com/clue/burger
[grape] Burger is a white wine grape of French origin, today planted primarily in the Central Valley. Its French name is Monbadon. In the early history of Californian wine, Burger was a majority variety but its influence has steadily decreased and now it is used primarily in bulk jug wine production. ==Synonyms== Burger is also known under ... Found on http://en.wikipedia.org/wiki/Burger_(grape)
Synonym for the grape varieties Elbling (also Burgauer, Burger Blanc, Burger Elbling), Heunisch(Gouais Blanc) and Monbadon; see there. Found on https://glossary.wein.plus/burger