Garland fashioned of stone (7)
I believe the answer is:
festoon
'garland' is the definition.
(I've seen this before)
'fashioned of stone' is the wordplay.
'fashioned' is an anagram indicator.
'of'+'stone'='ofstone'
'ofstone' anagrammed gives 'FESTOON'.
(Other definitions for festoon that I've seen before include "Decorative chain" , "Garland with flowers" , "Hung garland" , "Decoration" , "Decorate with hanging ornaments" .)