Garbed for a change in Eastern fabric (9)
I believe the answer is:
gaberdine
'fabric' is the definition.
(I've seen this before)
'garbed for a change in eastern' is the wordplay.
'for a change' is an anagram indicator.
'eastern' becomes 'e'.
'garbed' anagrammed gives 'gaberd'.
'gaberd'+'in'+'e'='GABERDINE'
(Other definitions for gaberdine that I've seen before include "twill" , "Mac; began ride (anag.)" , "Raincoat fabric" .)