Brown agrees to be different wearing these! (9)

I believe the answer is:

dungarees

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'different wearing these' is the definition.
The definition suggests an adverb but the answer is not.

'brown agrees to be' is the wordplay.
'brown' becomes 'dun' (dun is a kind of brown).
'to be' indicates an anagram.
'agrees' anagrammed gives 'garees'.
'dun'+'garees'='DUNGAREES'

Can you help me to learn more?

(Other definitions for dungarees that I've seen before include "Worker's trousers with a bib" , "Overall" , "overalls required" , "protection at work" , "Overalls of cotton fabric" .)

I've seen this clue in The Telegraph.

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