Crossword Genius

The least little job makes the workers sour (5,4)

Ross

I believe the answer is:

hands turn

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'the least little job makes' is the definition.
I know nothing about this answer so I can't judge whether this works.

'workers sour' is the wordplay.
'workers' becomes 'hands' (hand is a kind of worker).
'sour' becomes 'turn' (synonyms).
'hands'+'turn'='HANDS TURN'

'the' is the link.

Can you help me to learn more?

(Another definition for hands turn that I've seen is " bit of effort".)

I've seen this clue in the Evening Standard.
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