Booked

7 clues
Engaged
Reserved
Made a reservation
Reserved, as a room
Arrested and charged
Sold out in advance, with "up
Unavailable, as for appointments
Similar answers:
Aboo
Abook
Abookertbgeorgecdinah
Abookofthebible
Aboomerang
Aboon
Aboost
Aboot
Accountbooks
Actionpacked
Addressbook
Afterbeingasked
Afteritwascooked
Agebeforebooty
Agendabook
Agoodbook
Agrossofboors
Allbookedup
Alljokedup
Allnakedtruths