See Carl mixing wheat and corn? (7)

I believe the answer is:

cereals

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'wheat and corn?' is the definition.
I can't tell whether this definition defines the answer.

'see carl mixing' is the wordplay.
'mixing' indicates an anagram.
'see'+'carl'='seecarl'
'seecarl' is an anagram of 'CEREALS'.

Can you help me to learn more?

(Other definitions for cereals that I've seen before include "Starchy grains used as food" , "Foods such as rye, wheat, etc" , "Breakfast foods" , "Stubbornly unmoving" , "Eg, wheat, rye, oats" .)

I've seen this clue in The Sun.

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