Munch for instance on grain we cultivated (9)

I believe the answer is:

norwegian

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'munch for instance' is the definition.
I can't judge whether this definition defines the answer.

'on grain we cultivated' is the wordplay.
'cultivated' indicates an anagram.
'on'+'grain'+'we'='ongrainwe'
'ongrainwe' with letters rearranged gives 'NORWEGIAN'.

Can you help me to learn more?

(Other definitions for norwegian that I've seen before include "Foreigner" , "like King Harald I" , "like Grieg" , "Grieg perhaps" , "Native to, eg, Oslo" .)

I've seen this clue in The Telegraph.

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