Hippies' dish (3)

I believe the answer is:

pie

I'm a little stuck... Click here to teach me more about this clue!

'dish' is the definition.
(I've seen this before)

'hippies'' is the wordplay.
'PIE' is hidden within the letters.
But, I am unsure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for pie that I've seen before include "something with custard, say" , "Food baked under pastry" , "Pastry-crust savoury" , "Fruit or meat dish" , "Crusty dish" .)

I've seen this clue in The Mirror.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.