The Only Use of

graft
in
A Tree Grows in Brooklyn

She'd go out scrubbing floors like Mama or graft chop suey off of her men friends like Floss Gaddis did.
Chpt 28

graft = combine different ingredients to make (figurative use)

Definitions:

(1) (graft as in: skin graft)
to artificially join two things; or the smaller of the items joined; or the location of the joining

Common examples are the grafting of a plant shoot to another plant stem or the grafting of skin tissue to replace skin lost due to fire or other accident. This sense of graft can also be used metaphorically as in "graft the provision onto the legislative bill."
(2) (graft as in: graft and corruption)
corruption in which one uses their position to gain personal advantage -- especially political corruption