Directions in a set of books getting about (5)
I believe the answer is:
anent
'about' is the definition.
(I've seen this before)
'directions in a set of books getting' is the wordplay.
'directions' becomes 'en' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'set of books' becomes 'nt' (New Testament).
'getting' means one lot of letters go next to another.
'a'+'nt'='ant'
'en' placed within 'ant' is 'ANENT'.
(Other definitions for anent that I've seen before include "About (Scottish)" , "Concerning (archaic)" , "Concerned with" .)