Cleaning aide rusted away (6)

I believe the answer is:

duster

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'cleaning aide' is the definition.
'duster' can be an answer for 'cleaning' (thesaurus). I'm not certain of the 'aide' bit.

'rusted away' is the wordplay.
'away' indicates anagramming the letters (letters move away from their original places).
'rusted' is an anagram of 'DUSTER'.

Can you help me to learn more?

(Other definitions for duster that I've seen before include "Rusted (anag)" , "Soft cloth for cleaning surface" , "Cloth for removing surface powder" , "cleaner" , "yellow cloth" .)

I've seen this clue in The Mirror.

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