Elegant rarity, terrible manager (8,5)
I believe the answer is:
literary agent
'manager' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'elegant rarity terrible' is the wordplay.
'terrible' indicates anagramming the letters.
'elegant'+'rarity'='elegantrarity'
'elegantrarity' anagrammed gives 'LITERARY AGENT'.
Can you help me to learn more?
(Other definitions for literary agent that I've seen before include "One who deals with an author's affairs" , "Author's manager" , "Writer's representative" , "Representative for authors" , "Bloomsbury businessman perhaps" .)