Hippies have food (3)
I believe the answer is:
pie
'food' is the definition.
(pie is a kind of food)
'hippies have' is the wordplay.
'have' says the answer is hidden in the clue.
'PIE' can be found hidden inside 'hippies'.
(Other definitions for pie that I've seen before include "Pastry-topped dish" , "Anna's constituent" , "Slapstick missile" , "Food baked under pastry" , "bakery item" .)