Grumpy guy gets lemon curd for a change (12)

I believe the answer is:

curmudgeonly

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'grumpy' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?

'guy gets lemon curd for a change' is the wordplay.
'gets' says to put letters next to each other.
'for a change' indicates an anagram.
'guy'+'lemon'+'curd'='guylemoncurd'
'guylemoncurd' anagrammed gives 'CURMUDGEONLY'.

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 Irish Times.

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