Jam that vegans can eat (6)
I believe the answer is:
squash
'jam' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for squash that I've seen before include "Put down - indoor game" , "Trample on" , "Crush or squeeze flat" , "Fruit - drink - crush" , "behind glass" .)