A choice literary gathering (9)
I believe the answer is:
anthology
'literary gathering' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'a choice' is the wordplay.
I cannot quite see how this works, but
'a' could be 'an' and 'an' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for anthology that I've seen before include "Literary compendium" , "Book of selected pieces" , "Collection of literary works" , "Compendium of writings" , "Collection of pieces by different writers" .)