Some train depot figs.

ETDS

Think of what might be abbreviated on a railroad timetable for arrivals and departures.

This clue plays with abbreviations and a bit of word trickery. "Train depot" hints at a station, often shortened to "STN," but here it's clued as "ETD" (estimated time of departure), a common rail term. The "figs." part is short for "figures," meaning letters or numbers—so you take the first letters of "estimated time of departure" to get "ETD" and add an "S" for plural "figs." The answer is the initials plus that extra letter.