Eastern miner wore fur (6)
I believe the answer is:
ermine
'fur' is the definition.
(I know that ermine is a type of fur)
'eastern miner wore' is the wordplay.
'eastern' becomes 'e'.
'wore' indicates anagramming the letters (I've seen 'wearing' mean this (wear can mean to become damaged)).
'miner' anagrammed gives 'rmine'.
'e'+'rmine'='ERMINE'
(Other definitions for ermine that I've seen before include "'Trimming on royal robes, say (6)'" , "Expensive white fur" , "White fur from kind of 25 Across - judges may wear it" , "Stoat's winter fur" , "White fur of stoat" .)