noun, noun or participle which takes 'suru', intransitive verb
early-morning departure
Refers specifically to setting out on a journey or leaving early in the morning. Often used in literary or travel contexts.
旅館を早立ちして、次の目的地へ向かった。
We made an early-morning departure from the inn and headed to the next destination.
早立ちの準
We had prepared for the early-morning departure the night before.