Offer Guy lemon curd and get grouchy response (12)

I believe the answer is:

curmudgeonly

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'get grouchy response' is the definition.
I can't tell whether this definition defines the answer.

'offer guy lemon curd' is the wordplay.
'guy lemon curd' can be anagrammed to 'CURMUDGEONLY'.
But, I am not clear how this is indicated.

'and' is the link.

Can you help me to learn more?

(Another definition for curmudgeonly that I've seen is " Bad-tempered".)

I've seen this clue in The Globe and Mail.

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