They make a dish with iron (7)

I believe the answer is:

waffles

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'they' is the definition.
Both the answer and definition are plural nouns.
Maybe there's a link between them I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for waffles that I've seen before include "Cakes" , "Talks imprecisely" , "doesn't avoid 27 [VERBIAGE]" , "Talks vaguely" .)

I've seen this clue in The Guardian.

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