Reserves a short trip to a place of purchase (8)
I believe the answer is:
bookshop
'a place of purchase' is the definition.
I can't judge whether this defines the answer.
'reserves a short trip' is the wordplay.
'reserves' becomes 'books' (booking is a kind of reserving).
'a short trip' becomes 'hop' (I have seen 'Short trip ' mean 'hop' so perhaps 'trip' could also mean 'hop'; 'short' asks for an abbreviation).
'books'+'hop'='BOOKSHOP'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for bookshop that I've seen before include "works store" , "Reading matter sold here" .)