Cleaning equipment badly rusted (6)
I believe the answer is:
duster
'cleaning equipment' is the definition.
'duster' can be an answer for 'cleaning' (thesaurus). I am not sure about the 'equipment' bit.
'badly rusted' is the wordplay.
'badly' indicates anagramming the letters.
'rusted' is an anagram of 'DUSTER'.
Can you help me to learn more?
(Other definitions for duster that I've seen before include "yellow cloth" , "Polishing cloth" , "Soft cloth for cleaning surface" , "Cloth for removing surface powder" , "Rusted (anag)" .)