Finger pointer (5)
I believe the answer is:
index
I believe this clue is a double definition.
'finger' is the first definition.
(I know that index is a type of finger)
'pointer' is the second definition.
(I've seen this in another clue)
(Other definitions for index that I've seen before include "List of contents in book" , "that may be on the cards?" , "Guide, table" , "list of unreadable books" , "Pointer" .)