Crossword Genius

What cleaner does in Earls Court to some extent (5)

Ross

I believe the answer is:

scour

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'what cleaner' is the definition.
I can't judge whether this definition defines the answer.

'in earls court to some extent' is the wordplay.
'to some extent' indicates a hidden word.
'SCOUR' is hidden within 'in earls court'.

'does' acts as a link.

Can you help me to learn more?

(Other definitions for scour that I've seen before include "Clean by scrubbing" , "Clean by abrasion" , "Turn upside down" , "Attack with brush" , "Clean abrasively" .)

I've seen this clue in The Times.
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