Last three bothering me. 17a Books not bought at first without a couple of tokens (9) R - M - N - E - S Could be Romancers, or Reminders.
42d Persuaded to serve, almost pay attention finally? (8) - N - I - T - D
Looks like Enlisted, but not sure
47d Desert bug (6) - E - E - T Looks like Defect, again not sure
Thanks.