It's Spooner's dad who's reserved takeaway? (3,4)

I believe the answer is:

pie shop

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'spooner's dad who's reserved takeaway?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'it's' is the wordplay.
I cannot quite see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Independent.

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