Scoured Canada's capital with slim journalist (7)

I believe the answer is:

cleaned

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'scoured' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

'canada's capital with slim journalist' is the wordplay.
'capital' says to take the initial letters.
'with' means one lot of letters go next to another.
'slim' becomes 'lean' (similar in meaning).
'journalist' becomes 'ed' (short for editor).
The initial letter of 'canadas' is 'c'.
'c'+'lean'+'ed'='CLEANED'

Can you help me to learn more?

(Other definitions for cleaned that I've seen before include "Refined" , "Washed" , "wiped" , "Made free of dirt" , "Freed from dirt" .)

I've seen this clue in The Daily Express.

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