Related Clues:
- Undecided, on a sked
- Slot-to-fill abbr
- Letters on a schedule meaning 'We'll let you know'
- 'Still open,' on a sched
- "Not sure yet," on a sched
- Schedule inits
- 'More info later': Abbr
- Unfilled schedule slot abbr
- Timetable abbr. hidden in 17- and 61-Across and 11- and 29-Down
- "More info later": Abbr
- Not an elective: Abbr
- Unfilled as yet, for short
- Slot's space holder
- Letters on an unfinished sched
- ''I'll tell you later,'' TV Guide-style