Erode article covered by erosion (7)
I believe the answer is:
weather
'erode' is the definition.
(thesaurus)
'article covered by erosion' is the wordplay.
'article' becomes 'the' (the definite article).
'covered by' is an insertion indicator.
'erosion' becomes 'wear' (I've seen this before).
'the' placed inside 'wear' is 'WEATHER'.
(Other definitions for weather that I've seen before include "ride out" , "Local atmospheric conditions" , "Climatic conditions" , "Withstand" , "Endure" .)