Support in the library to reserve hotel in person (9)
I believe the answer is:
bookshelf
'support in the library' is the definition.
'bookshelf' can be an answer for 'support' (bookshelf is a kind of support). I'm not certain of the 'in the library' bit.
'reserve hotel in person' is the wordplay.
'reserve' becomes 'book' (to book something is to reserve it).
'hotel' becomes 'h' (phonetic alphabet).
'in' indicates putting letters inside.
'person' becomes 'self' (self is a kind of person).
'h' going inside 'self' is 'shelf'.
'book'+'shelf'='BOOKSHELF'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for bookshelf that I've seen before include "Library furniture item" , "It may hold great volumes?" , "Library support" , "supporter of literary works" , "A supporter of literature?" .)