Crossword Genius

For the food, I lay out (6)

Ross

I believe the answer is:

plaice

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

This clue could be a double definition.

'for the food' is the first definition.
(plaice is a kind of food)

'i lay out' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

Can you help me to learn more?

(Other definitions for plaice that I've seen before include "Location of the fish" , "Flat fare" , "A succulent flat-fish" , "Type of fish" , "A fish; sounds like put" .)

I've seen this clue in the Evening Standard.
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