Crossword Genius

Possibly half baked line in education! (3)

Ross

I believe the answer is:

pie

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

This might be a double definition.

'possibly half baked line' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'education' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for pie that I've seen before include "Bird; pastry" , "Food baked under pastry" , "Bird - dish - mixed type" , "Covered tart" , "Fruit or meat dish" .)

I've seen this clue in the Evening Standard.
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