Food stored by hippies (3)
I believe the answer is:
pie
'food' is the definition.
(pie is a kind of food)
'stored by hippies' is the wordplay.
'stored by' indicates the answer is hidden within the clue.
'PIE' is hidden within 'hippies'.
(Other definitions for pie that I've seen before include "welcome luxury" , "Type of chart" , "where blackbirds sang" , "Small, former Indian coin" , "Slapstick missile" .)