Crossword Genius

Grumpiness as a result of some funny ailment? (3,6)

Ross

I believe the answer is:

ill humour

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'grumpiness' is the definition.
Both the answer and definition are singular nouns.
Perhaps you can see a link between them that I can't see?

'some funny ailment?' is the wordplay.
'some funny' becomes 'ill' (eg feeling a bit funny).
'ailment?' becomes 'humour' (I can't justify this - if you can you should give a lot more credence to this answer).
'ill'+'humour'='ILL-HUMOUR'

'as a result of' acts as a link.

Can you help me to learn more?

(Other definitions for ill humour that I've seen before include "bad mood" , "bad temper" , "bad feeling" .)

I've seen this clue in the Evening Standard.
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