Answer:

BOOKEND

Answer	Crossword Clue
BOOKEND	Shelf item
BOOKEND	Football player studying literature?
BOOKEND	Shelf support

BOOKEND	Volume supporter
BOOKEND	Half of a library set.
BOOKEND	Library item
BOOKEND	Shelf prop ... or a hint to both parts of the answers to the six starred clues
BOOKEND	Library prop?
BOOKEND	Novel support?
BOOKEND	Go on either side of