Vegan staple (4)
I believe the answer is:
tofu
'vegan staple' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tofu that I've seen before include "Food from bean curd" , "Curdled soybean dish" , "Soya bean product used in Asian and vegetarian cookery" , "Substitute for meat" , "soybean curd" .)