Magnificence of recycled old prunes (9)
I believe the answer is:
splendour
'magnificence' is the definition.
(I know that magnificence can be written as splendour)
'recycled old prunes' is the wordplay.
'recycled' is an anagram indicator.
'old'+'prunes'='oldprunes'
'oldprunes' anagrammed gives 'SPLENDOUR'.
'of' is the link.
(Other definitions for splendour that I've seen before include "Spectacle" , "Magnificent appearance" , "Glory, brilliance" , "Brilliant appearance" , "Sumptuous display - Len's proud (anag)" .)