Sour disposition of US men, prigs being awkward (10)

I believe the answer is:

grumpiness

'sour disposition' is the definition.

'us men prigs being awkward' is the wordplay.
'being awkward' indicates anagramming the letters.
'us'+'men'+'prigs'='usmenprigs'
'usmenprigs' anagrammed gives 'GRUMPINESS'.

'of' is the link.

(Another definition for grumpiness that I've seen is " Bad humour".)

I've seen this clue in The Times.

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