17 down
Hope
to
God
every
third
letter
appears
in
books
made
to
order
(3)
Hope to God every third letter appears in books made to order (3)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is books made to order, referring to POD (print on demand). Taking every third letter of "Hope to God" (H-O-P-E-T-O-G-O-D) gives positions 3, 6 and 9 — P, O and D — spelling POD.