Badly rusted cleaning equipment (6)
I believe the answer is:
duster
'cleaning equipment' is the definition.
'duster' can be an answer for 'cleaning' (thesaurus). I am not certain of the 'equipment' bit.
'badly rusted' is the wordplay.
'badly' indicates anagramming the letters (letters in the wrong order).
'rusted' is an anagram of 'DUSTER'.
Can you help me to learn more?
(Other definitions for duster that I've seen before include "Cloth for cleaning chalk from blackboard" , "cleaner" , "Cloth for removing surface powder" , "yellow cloth" , "Polishing cloth" .)