Rich nun at bad parties (8)
I believe the answer is:
abundant
'rich' is the definition.
(similar in meaning)
'nun at bad parties' is the wordplay.
'parties' is an anagram indicator (the letters move or party around).
'nun'+'at'+'bad'='nunatbad'
'nunatbad' with letters rearranged gives 'ABUNDANT'.
(Other definitions for abundant that I've seen before include "well-provided" , "Copious, plentiful" , "Present in great quantity" , "Copious, profuse" , "Present in large quantities" .)