Beautiful rug, so oil damaged (8)
I believe the answer is:
glorious
'beautiful' is the definition.
(similar in meaning)
'rug so oil damaged' is the wordplay.
'damaged' indicates anagramming the letters.
'rug'+'so'+'oil'='rugsooil'
'rugsooil' with letters rearranged gives 'GLORIOUS'.
(Other definitions for glorious that I've seen before include "Fine" , "Splendid, excellent" , "'Magnificent, splendid (8)'" , "Splendid - delightful - eminent" , "Magnificent; our Revolution" .)