Crossword Genius

Architect may make this bad pastry dish for Spooner (5,4)

Ross

I believe the answer is:

floor plan

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

This might be a double definition.

'architect may make this bad pastry' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'dish for spooner' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?

Can you help me to learn more?

(Other definitions for floor plan that I've seen before include "Design" , "map" .)

I've seen this clue in The Guardian.
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