Crossword Genius

Complaint jointly suffered by scrubbers, perhaps? (10,4)

Ross

I believe the answer is:

housemaids knee

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'complaint' is the definition.
(housemaid's knee is a kind of disease)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for housemaids knee that I've seen before include "complaint to a servant?" , "joint tenderness" , "Joint inflammation" .)

I've seen this clue in The Times.
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