Dishes for heating synthetic emerald, say (5,5)

I believe the answer is:

ready meals

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'dishes for heating synthetic emerald' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'say' is the wordplay.
I cannot really understand how this works, but
'say' could be 'read' (synonyms) and 'read' is found in the answer.
This explanation may well be incorrect...

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I've seen this clue in The Sunday Times.

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