Reserve staff gathering in library? (4,4)
I believe the answer is:
book club
'gathering in library?' is the definition.
'book club' can be an answer for 'gathering' (I have seen 'literary gathering' mean 'book club' so perhaps 'gathering' could also mean 'book club'). I am not certain of the 'in library?' bit.
'reserve staff' is the wordplay.
'reserve' becomes 'book' (to book something is to reserve it).
'staff' becomes 'club' (I can't explain this - if you can you should believe this answer much more).
'book'+'club'='BOOK CLUB'
Can you help me to learn more?
(Other definitions for book club that I've seen before include "Society giving members cheaper access to reading material" , "Society for readers" , "group of readers" , "Lit. Soc." , "Literary group" .)