Reworked last design as feature of church (7,5)
I believe the answer is:
stained glass
'feature of church' is the definition.
'stained glass' can be an answer for 'feature' (I have seen 'decorative feature' mean 'stained glass' so perhaps 'feature' could also mean 'stained glass'). I am not sure about the 'of church' bit.
'reworked last design as' is the wordplay.
'reworked' indicates an anagram.
'last'+'design'+'as'='lastdesignas'
'lastdesignas' is an anagram of 'STAINED GLASS'.
Can you help me to learn more?
(Other definitions for stained glass that I've seen before include "Church window material" , "Feature of church windows" , "Art of church windows" , "Feature in decorative windows" , "window feature" .)