It's eaten in pieces (3)
I believe the answer is:
pie
'it's eaten in pieces' is the definition.
I can't judge whether this definition defines the answer.
'it's' is the wordplay.
I cannot really understand how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
The remaining letters 'pi' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pie that I've seen before include "Irrational things to do with circles and logs" , "Anna's constituent" , "Pastry-crust savoury" , "In the sky, this dish is impractical" , "Pastry-covered dish" .)