How the repairman settled the quarrel? (7,2)

I believe the answer is:

patched up

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'settled the quarrel?' is the definition.
'patched up' can be an answer for 'settled' ('patch up' can be a synonym of 'settle'). I am unsure of the 'the quarrel?' bit.

I cannot understand how the remainder of the clue works.

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I've seen this clue in the Evening Standard.

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