Turning brownish, river shows way of the world (6)

I believe the answer is:

nature

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'way of the world' is the definition.
'nature' can be an answer for 'world' (synonyms). I'm not certain of the 'way of the' bit.

'turning brownish river' is the wordplay.
'turning' says the letters should be written in reverse.
'brownish' becomes 'tan' (I've seen this in another clue).
'river' becomes 'ure' (River Ure).
'tan' reversed gives 'nat'.
'nat'+'ure'='NATURE'

'shows' is the link.

Can you help me to learn more?

(Other definitions for nature that I've seen before include "Inborn character; essence" , "Essential quality" , "Tea-urn for outdoors" , "Kind - disposition" , "Kind, sort; countryside" .)

I've seen this clue in The Telegraph.

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